# RD Sharma solutions for Class 12 Maths chapter 4 - Inverse Trigonometric Functions [Latest edition]

## Chapter 4: Inverse Trigonometric Functions

Exercise 4.1Exercise 4.2Exercise 4.3Exercise 4.4Exercise 4.5Exercise 4.6Exercise 4.7Exercise 4.8Exercise 4.9Exercise 4.11Exercise 4.12Exercise 4.13Exercise 4.14Exercise 4.15Exercise 4.16
Exercise 4.1 [Pages 6 - 7]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.1 [Pages 6 - 7]

Exercise 4.1 | Q 1.1 | Page 6

Find the principal value of the following:

sin^-1(-sqrt3/2)

Exercise 4.1 | Q 1.2 | Page 6

Find the principal value of the following:

sin^-1(cos  (2pi)/3)

Exercise 4.1 | Q 1.3 | Page 6

Find the principal value of the following:

sin^-1((sqrt3-1)/(2sqrt2))

Exercise 4.1 | Q 1.4 | Page 6

Find the principal value of the following:

sin^-1((sqrt3+1)/(2sqrt2))

Exercise 4.1 | Q 1.5 | Page 6

Find the principal value of the following:

sin^-1(cos  (3pi)/4)

Exercise 4.1 | Q 1.6 | Page 6

Find the principal value of the following:

sin^-1(tan  (5pi)/4)

Exercise 4.1 | Q 2.1 | Page 7

sin^-1  1/2-2sin^-1  1/sqrt2

Exercise 4.1 | Q 2.2 | Page 7

sin^-1{cos(sin^-1  sqrt3/2)}

Exercise 4.1 | Q 3.1 | Page 7

Find the domain of the following function:

f(x)=sin^-1x^2

Exercise 4.1 | Q 3.2 | Page 7

Find the domain of the following function:

f(x) = sin^-1x + sinx

Exercise 4.1 | Q 3.3 | Page 7

Find the domain of the following function:

f(x)sin^-1sqrt(x^2-1)

Exercise 4.1 | Q 3.4 | Page 7

Find the domain of the following function:

f(x)=sin^-1x+sin^-1 2x

Exercise 4.1 | Q 4 | Page 7

If sin^-1 x + sin^-1 y+sin^-1 z+sin^-1 t=2pi , then find the value of x2 + y2 + z2 + t2

Exercise 4.1 | Q 5 | Page 7

If (sin^-1x)^2 + (sin^-1y)^2+(sin^-1z)^2=3/4pi^2,  find the value of x2 + y2 + z2

Exercise 4.1, Exercise 4.2 [Page 10]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.1, Exercise 4.2 [Page 10]

Exercise 4.1 | Q 1 | Page 10

Find the domain of definition of f(x)=cos^-1(x^2-4)

Exercise 4.2 | Q 2 | Page 10

Find the domain of  f(x) =2cos^-1 2x+sin^-1x.

Exercise 4.2 | Q 3 | Page 10

Find the domain of f(x)=cos^-1x+cosx.

Exercise 4.2 | Q 4.1 | Page 10

​Find the principal values of the following:
cos^-1(-sqrt3/2)

Exercise 4.2 | Q 4.2 | Page 10

​Find the principal values of the following:

cos^-1(-1/sqrt2)

Exercise 4.2 | Q 4.3 | Page 10

​Find the principal values of the following:

cos^-1(sin   (4pi)/3)

Exercise 4.2 | Q 4.4 | Page 10

​Find the principal values of the following:

cos^-1(tan  (3pi)/4)

Exercise 4.2 | Q 5.1 | Page 10

For the principal value, evaluate of the following:

cos^-1  1/2+2sin^-1  (1/2)

Exercise 4.2 | Q 5.3 | Page 10

For the principal value, evaluate of the following:

sin^-1(-1/2)+2cos^-1(-sqrt3/2)

Exercise 4.2 | Q 5.4 | Page 10

For the principal value, evaluate of the following:

sin^-1(-sqrt3/2)+cos^-1(sqrt3/2)

Exercise 4.3 [Page 14]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.3 [Page 14]

Exercise 4.3 | Q 1.1 | Page 14

Find the principal value of the following:

tan^-1(1/sqrt3)

Exercise 4.3 | Q 1.2 | Page 14

Find the principal value of the following:

tan^-1(-1/sqrt3)

Exercise 4.3 | Q 1.3 | Page 14

Find the principal value of the following:

tan^-1(cos  pi/2)

Exercise 4.3 | Q 1.4 | Page 14

Find the principal value of the following:

tan^-1(2cos  (2pi)/3)

Exercise 4.3 | Q 2.1 | Page 14

For the principal value, evaluate of the following:

tan^-1(-1)+cos^-1(-1/sqrt2)

Exercise 4.3 | Q 2.2 | Page 14

For the principal value, evaluate of the following:

tan^-1{2sin(4cos^-1  sqrt3/2)}

Exercise 4.3 | Q 3.1 | Page 14

Evaluate the following:

tan^-1 1+cos^-1 (-1/2)+sin^-1(-1/2)

Exercise 4.3 | Q 3.2 | Page 14

Evaluate the following:

tan^-1(-1/sqrt3)+tan^-1(-sqrt3)+tan^-1(sin(-pi/2))

Exercise 4.3 | Q 3.3 | Page 14

Evaluate the following:

tan^-1(tan  (5pi)/6)+cos^-1{cos((13pi)/6)}

Exercise 4.4 [Page 18]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.4 [Page 18]

Exercise 4.4 | Q 1.1 | Page 18

Find the principal value of the following:

sec^-1(-sqrt2)

Exercise 4.4 | Q 1.2 | Page 18

Find the principal value of the following:

sec^-1(2)

Exercise 4.4 | Q 1.3 | Page 18

Find the principal value of the following:

sec^-1(2sin  (3pi)/4)

Exercise 4.4 | Q 1.4 | Page 18

Find the principal value of the following:

sec^-1(2tan  (3pi)/4)

Exercise 4.4 | Q 2.1 | Page 18

For the principal value, evaluate the following:

tan^-1sqrt3-sec^-1(-2)

Exercise 4.4 | Q 2.2 | Page 18

For the principal value, evaluate the following:

sin^-1(-sqrt3/2)-2sec^-1(2tan  pi/6)

Exercise 4.4 | Q 3.1 | Page 18

Find the domain of sec^(-1)(3x-1).

Exercise 4.4 | Q 3.2 | Page 18

Find the domain of sec^(-1) x-tan^(-1)x

Exercise 4.5 [Page 21]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.5 [Page 21]

Exercise 4.5 | Q 1.1 | Page 21

​Find the principal value of the following:

cosec^-1(-sqrt2)

Exercise 4.5 | Q 1.2 | Page 21

​Find the principal value of the following:

cosec-1(-2)

Exercise 4.5 | Q 1.3 | Page 21

​Find the principal value of the following:

\text(cosec)^-1(2/sqrt3)

Exercise 4.5 | Q 1.4 | Page 21

​Find the principal value of the following:

cosec^-1(2cos  (2pi)/3)

Exercise 4.5 | Q 2 | Page 21

Find the set of values of cosec^-1(sqrt3/2)

Exercise 4.5 | Q 3.1 | Page 21

For the principal value, evaluate the following:

sin^-1(-sqrt3/2)+\text{cosec}^-1(-2/sqrt3)

Exercise 4.5 | Q 3.2 | Page 21

For the principal value, evaluate the following:

sec^-1(sqrt2)+2\text{cosec}^-1(-sqrt2)

Exercise 4.5 | Q 3.3 | Page 21

For the principal value, evaluate the following:

sin^-1[cos{2\text(cosec)^-1(-2)}]

Exercise 4.5 | Q 3.4 | Page 21

For the principal value, evaluate the following:

cosec^-1(2tan  (11pi)/6)

Exercise 4.6 [Page 24]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.6 [Page 24]

Exercise 4.6 | Q 1.1 | Page 24

Find the principal value of the following:

cot^-1(-sqrt3)

Exercise 4.6 | Q 1.2 | Page 24

Find the principal value of the following:

cot^-1(sqrt3)

Exercise 4.6 | Q 1.3 | Page 24

Find the principal value of the following:

cot^-1(-1/sqrt3)

Exercise 4.6 | Q 1.4 | Page 24

Find the principal value of the following:

cot^-1(tan  (3pi)/4)

Exercise 4.6 | Q 2 | Page 24

Find the domain of f(x)=cotx+cot^-1x

Exercise 4.6 | Q 3.1 | Page 24

Evaluate the following:

cot^-1  1/sqrt3-\text(cosec)^-1(-2)+sec^-1(2/sqrt3)

Exercise 4.6 | Q 3.2 | Page 24

Evaluate the following:

cot^-1{2cos(sin^-1  sqrt3/2)}

Exercise 4.6 | Q 3.3 | Page 24

Evaluate the following:

\text(cosec)^-1(-2/sqrt3)+2cot^-1(-1)

Exercise 4.6 | Q 3.4 | Page 24

Evaluate the following:

tan^-1(-1/sqrt3)+cot^-1(1/sqrt3)+tan^-1(sin(-pi/2))

Exercise 4.7 [Pages 42 - 43]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.7 [Pages 42 - 43]

Exercise 4.7 | Q 1.01 | Page 42

sin^-1(sin  pi/6)

Exercise 4.7 | Q 1.02 | Page 42

sin^-1(sin  (7pi)/6)

Exercise 4.7 | Q 1.03 | Page 42

sin^-1(sin  (5pi)/6)

Exercise 4.7 | Q 1.04 | Page 42

sin^-1(sin  (13pi)/7)

Exercise 4.7 | Q 1.05 | Page 42

sin^-1(sin  (17pi)/8)

Exercise 4.7 | Q 1.06 | Page 42

sin^-1{(sin - (17pi)/8)}

Exercise 4.7 | Q 1.07 | Page 42

sin^-1(sin3)

Exercise 4.7 | Q 1.08 | Page 42

sin^-1(sin4)

Exercise 4.7 | Q 1.09 | Page 42

sin^-1(sin12)

Exercise 4.7 | Q 1.1 | Page 42

sin^-1(sin2)

Exercise 4.7 | Q 2.1 | Page 42

Evaluate the following:

cos^-1{cos(-pi/4)}

Exercise 4.7 | Q 2.2 | Page 42

Evaluate the following:

cos^-1{cos  (5pi)/4}

Exercise 4.7 | Q 2.3 | Page 42

Evaluate the following:

cos^-1{cos  ((4pi)/3)}

Exercise 4.7 | Q 2.4 | Page 42

Evaluate the following:

cos^-1{cos  (13pi)/6}

Exercise 4.7 | Q 2.5 | Page 42

Evaluate the following:

cos^-1(cos3)

Exercise 4.7 | Q 2.6 | Page 42

Evaluate the following:

cos^-1(cos4)

Exercise 4.7 | Q 2.7 | Page 42

Evaluate the following:

cos^-1(cos5)

Exercise 4.7 | Q 2.8 | Page 42

Evaluate the following:

cos^-1(cos12)

Exercise 4.7 | Q 3.1 | Page 42

Evaluate the following:

tan^-1(tan  pi/3)

Exercise 4.7 | Q 3.2 | Page 42

Evaluate the following:

tan^-1(tan  (6pi)/7)

Exercise 4.7 | Q 3.3 | Page 42

Evaluate the following:

tan^-1(tan  (7pi)/6)

Exercise 4.7 | Q 3.4 | Page 42

Evaluate the following:

tan^-1(tan  (9pi)/4)

Exercise 4.7 | Q 3.5 | Page 42

Evaluate the following:

tan^-1(tan1)

Exercise 4.7 | Q 3.6 | Page 42

Evaluate the following:

tan^-1(tan2)

Exercise 4.7 | Q 3.7 | Page 42

Evaluate the following:

tan^-1(tan4)

Exercise 4.7 | Q 3.8 | Page 42

Evaluate the following:

tan^-1(tan12)

Exercise 4.7 | Q 4.1 | Page 42

Evaluate the following:

sec^-1(sec  pi/3)

Exercise 4.7 | Q 4.2 | Page 42

Evaluate the following:

sec^-1(sec  (2pi)/3)

Exercise 4.7 | Q 4.3 | Page 42

Evaluate the following:

sec^-1(sec  (5pi)/4)

Exercise 4.7 | Q 4.4 | Page 42

Evaluate the following:

sec^-1(sec  (7pi)/3)

Exercise 4.7 | Q 4.5 | Page 42

Evaluate the following:

sec^-1(sec  (9pi)/5)

Exercise 4.7 | Q 4.6 | Page 42

Evaluate the following:

sec^-1{sec  (-(7pi)/3)}

Exercise 4.7 | Q 4.7 | Page 42

Evaluate the following:

sec^-1(sec  (13pi)/4)

Exercise 4.7 | Q 4.8 | Page 42

Evaluate the following:

sec^-1(sec  (25pi)/6)

Exercise 4.7 | Q 5.1 | Page 42

Evaluate the following:

\text(cosec)^-1(\text{cosec}  pi/4)

Exercise 4.7 | Q 5.2 | Page 42

Evaluate the following:

cosec^-1(cosec  (3pi)/4)

Exercise 4.7 | Q 5.3 | Page 42

Evaluate the following:

cosec^-1(cosec  (6pi)/5)

Exercise 4.7 | Q 5.4 | Page 42

Evaluate the following:

cosec^-1(cosec  (11pi)/6)

Exercise 4.7 | Q 5.5 | Page 42

Evaluate the following:

cosec^-1(cosec  (13pi)/6)

Exercise 4.7 | Q 5.6 | Page 42

Evaluate the following:

cosec^-1{cosec  (-(9pi)/4)}

Exercise 4.7 | Q 6.1 | Page 43

Evaluate the following:

cot^-1(cot  pi/3)

Exercise 4.7 | Q 6.2 | Page 43

Evaluate the following:

cot^-1(cot  (4pi)/3)

Exercise 4.7 | Q 6.3 | Page 43

Evaluate the following:

cot^-1(cot  (9pi)/4)

Exercise 4.7 | Q 6.4 | Page 43

Evaluate the following:

cot^-1(cot  (19pi)/6)

Exercise 4.7 | Q 6.5 | Page 43

Evaluate the following:

cot^-1{cot (-(8pi)/3)}

Exercise 4.7 | Q 6.6 | Page 43

Evaluate the following:

cot^-1{cot  ((21pi)/4)}

Exercise 4.7 | Q 7.01 | Page 43

Write the following in the simplest form:

cot^-1  a/sqrt(x^2-a^2),|  x  | > a

Exercise 4.7 | Q 7.02 | Page 43

Write the following in the simplest form:

tan^-1{x+sqrt(1+x^2)},x in R

Exercise 4.7 | Q 7.03 | Page 43

Write the following in the simplest form:

tan^-1{sqrt(1+x^2)-x},x in R

Exercise 4.7 | Q 7.04 | Page 43

Write the following in the simplest form:

tan^-1{(sqrt(1+x^2)-1)/x},x !=0

Exercise 4.7 | Q 7.05 | Page 43

Write the following in the simplest form:

tan^-1{(sqrt(1+x^2)+1)/x},x !=0

Exercise 4.7 | Q 7.06 | Page 43

Write the following in the simplest form:

tan^-1sqrt((a-x)/(a+x)),-a<x<a

Exercise 4.7 | Q 7.07 | Page 43

Write the following in the simplest form:

tan^-1(x/(a+sqrt(a^2-x^2))),-a<x<a

Exercise 4.7 | Q 7.08 | Page 43

Write the following in the simplest form:

sin^-1{(x+sqrt(1-x^2))/sqrt2},-1<x<1

Exercise 4.7 | Q 7.09 | Page 43

Write the following in the simplest form:

sin^-1{(sqrt(1+x)+sqrt(1-x))/2},0<x<1

Exercise 4.7 | Q 7.1 | Page 43

Write the following in the simplest form:

sin{2tan^-1sqrt((1-x)/(1+x))}

Exercise 4.8 [Page 54]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.8 [Page 54]

Exercise 4.8 | Q 1.1 | Page 54

Evaluate the following:

sin(sin^-1  7/25)

Exercise 4.8 | Q 1.2 | Page 54

Evaluate the following:

sin(cos^-1  5/13)

Exercise 4.8 | Q 1.3 | Page 54

Evaluate the following:

sin(tan^-1  24/7)

Exercise 4.8 | Q 1.4 | Page 54

Evaluate the following:

sin(sec^-1  17/8)

Exercise 4.8 | Q 1.5 | Page 54

Evaluate the following:

cosec(cos^-1  3/5)

Exercise 4.8 | Q 1.6 | Page 54

Evaluate the following:

sec(sin^-1  12/13)

Exercise 4.8 | Q 1.7 | Page 54

Evaluate the following:

tan(cos^-1  8/17)

Exercise 4.8 | Q 1.8 | Page 54

Evaluate the following:

cot(cos^-1  3/5)

Exercise 4.8 | Q 1.9 | Page 54

Evaluate the following:

cos(tan^-1  24/7)

Exercise 4.8 | Q 2.1 | Page 54

Prove the following result

tan(cos^-1  4/5+tan^-1  2/3)=17/6

Exercise 4.8 | Q 2.2 | Page 54

Prove the following result

cos(sin^-1  3/5+cot^-1  3/2)=6/(5sqrt13)

Exercise 4.8 | Q 2.3 | Page 54

Prove the following result

=tan(sin^-1  5/13+cos^-1  3/5) = 63/16

Exercise 4.8 | Q 2.4 | Page 54

Prove the following result

sin(cos^-1  3/5+sin^-1  5/13)=63/65

Exercise 4.8 | Q 3 | Page 54

Solve: cos(sin^-1x)=1/6

Exercise 4.9 [Pages 58 - 59]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.9 [Pages 58 - 59]

Exercise 4.9 | Q 1.1 | Page 58

Evaluate:

cos{sin^-1(-7/25)}

Exercise 4.9 | Q 1.2 | Page 58

Evaluate:

sec{cot^-1(-5/12)}

Exercise 4.9 | Q 1.3 | Page 58

Evaluate:

cot{sec^-1(-13/5)}

Exercise 4.9 | Q 2.1 | Page 58

Evaluate:

tan{cos^-1(-7/25)}

Exercise 4.9 | Q 2.2 | Page 58

Evaluate:

cosec{cot^-1(-12/5)}

Exercise 4.9 | Q 2.3 | Page 58

Evaluate:

cos(tan^-1  3/4)

Exercise 4.9 | Q 3 | Page 59

Evaluate: sin{cos^-1(-3/5)+cot^-1(-5/12)}

Exercise 4.1 [Page 66]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.1 [Page 66]

Exercise 4.1 | Q 1.1 | Page 66

Evaluate:

cot(sin^-1  3/4+sec^-1  4/3)

Exercise 4.1 | Q 1.2 | Page 66

Evaluate:

sin(tan^-1x+tan^-1  1/x) for x < 0

Exercise 4.1 | Q 1.3 | Page 66

Evaluate:

sin(tan^-1x+tan^-1  1/x) for x > 0

Exercise 4.1 | Q 1.4 | Page 66

Evaluate:

cot(tan^-1a+cot^-1a)

Exercise 4.1 | Q 1.5 | Page 66

Evaluate:

cos(sec^-1x+\text(cosec)^-1x),|x|≥1

Exercise 4.1 | Q 2 | Page 66

If cos^-1x + cos^-1y =pi/4,  find the value of sin^-1x+sin^-1y

Exercise 4.1 | Q 3 | Page 66

If sin^-1x+sin^-1y=pi/3  and  cos^-1x-cos^-1y=pi/6,  find the values of x and y.

Exercise 4.1 | Q 4 | Page 66

If cot(cos^-1  3/5+sin^-1x)=0, find the values of x.

Exercise 4.1 | Q 5 | Page 66

If (sin^-1x)^2+(cos^-1x)^2=(17pi^2)/36,  Find x

Exercise 4.1 | Q 6 | Page 66

sin(sin^-1  1/5+cos^-1x)=1

Exercise 4.1 | Q 7 | Page 66

sin^-1x=pi/6+cos^-1x

Exercise 4.1 | Q 8 | Page 66

4sin^-1x=pi-cos^-1x

Exercise 4.1 | Q 9 | Page 66

tan^-1x+2cot^-1x=(2x)/3

Exercise 4.1 | Q 10 | Page 66

5tan^-1x+3cot^-1x=2x

Exercise 4.11 [Page 82]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.11 [Page 82]

Exercise 4.11 | Q 1.1 | Page 82

Prove the following result:

tan^-1  1/7+tan^-1  1/13=tan^-1  2/9

Exercise 4.11 | Q 1.2 | Page 82

Prove the following result:

sin^-1  12/13+cos^-1  4/5+tan^-1  63/16=pi

Exercise 4.11 | Q 1.3 | Page 82

Prove the following result:

tan^-1  1/4+tan^-1  2/9=sin^-1  1/sqrt5

Exercise 4.11 | Q 2 | Page 82

Find the value of tan^-1  (x/y)-tan^-1((x-y)/(x+y))

Exercise 4.11 | Q 3.01 | Page 82

Solve the following equation for x:

tan^-1  2x+tan^-1  3x = npi+(3pi)/4

Exercise 4.11 | Q 3.02 | Page 82

Solve the following equation for x:

tan−1(x + 1) + tan−1(x − 1) = tan−18/31

Exercise 4.11 | Q 3.03 | Page 82

Solve the following equation for x:

tan−1(x −1) + tan−1x tan−1(x + 1) = tan−13x

Exercise 4.11 | Q 3.04 | Page 82

Solve the following equation for x:

tan−1((1-x)/(1+x))-1/2 tan−1x = 0, where x > 0

Exercise 4.11 | Q 3.05 | Page 82

Solve the following equation for x:

cot−1x − cot−1(x + 2) =pi/12, > 0

Exercise 4.11 | Q 3.06 | Page 82

Solve the following equation for x:

tan−1(x + 2) + tan−1(x − 2) = tan−1 (8/79), x > 0

Exercise 4.11 | Q 3.07 | Page 82

Solve the following equation for x:

tan^-1  x/2+tan^-1  x/3=pi/4, 0<x<sqrt6

Exercise 4.11 | Q 3.08 | Page 82

Solve the following equation for x:

tan^-1((x-2)/(x-4))+tan^-1((x+2)/(x+4))=pi/4

Exercise 4.11 | Q 3.09 | Page 82

Solve the following equation for x:

tan^-1(2+x)+tan^-1(2-x)=tan^-1  2/3, where  x< -sqrt3 or, x>sqrt3

Exercise 4.11 | Q 3.1 | Page 82

Solve the following equation for x:

tan^-1  (x-2)/(x-1)+tan^-1  (x+2)/(x+1)=pi/4

Exercise 4.11 | Q 4 | Page 82

Sum the following series:

tan^-1  1/3+tan^-1  2/9+tan^-1  4/33+...+tan^-1  (2^(n-1))/(1+2^(2n-1))

Exercise 4.12 [Page 89]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.12 [Page 89]

Exercise 4.12 | Q 1 | Page 89

Evaluate: cos(sin^-1  3/5+sin^-1  5/13)

Exercise 4.12 | Q 2.1 | Page 89

sin^-1  63/65=sin^-1  5/13+cos^-1  3/5

Exercise 4.12 | Q 2.2 | Page 89

sin^-1  5/13+cos^-1  3/5=tan^-1  63/16

Exercise 4.12 | Q 2.3 | Page 89

(9pi)/8-9/4sin^-1  1/3=9/4sin^-1  (2sqrt2)/3

Exercise 4.12 | Q 3.1 | Page 89

Solve the following:

sin^-1x+sin^-1  2x=pi/3

Exercise 4.12 | Q 3.2 | Page 89

Solve the following:

cos^-1x+sin^-1  x/2=pi/6

Exercise 4.13 [Page 92]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.13 [Page 92]

Exercise 4.13 | Q 1 | Page 92

If cos^-1  x/2+cos^-1  y/3=alpha, then prove that  9x^2-12xy cosa+4y^2=36sin^2a.

Exercise 4.13 | Q 2 | Page 92

Solve the equation cos^-1  a/x-cos^-1  b/x=cos^-1  1/b-cos^-1  1/a

Exercise 4.13 | Q 3 | Page 92

Solve cos^-1sqrt3x+cos^-1x=pi/2

Exercise 4.13 | Q 4 | Page 92

Prove that: cos^-1  4/5+cos^-1  12/13=cos^-1  33/65

Exercise 4.14 [Pages 115 - 116]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.14 [Pages 115 - 116]

Exercise 4.14 | Q 1.1 | Page 115

Evaluate the following:

tan{2tan^-1  1/5-pi/4}

Exercise 4.14 | Q 1.2 | Page 115

Evaluate the following:

tan  1/2(cos^-1  sqrt5/3)

Exercise 4.14 | Q 1.3 | Page 115

Evaluate the following:

sin(1/2cos^-1  4/5)

Exercise 4.14 | Q 1.4 | Page 115

Evaluate the following:

sin(2tan^-1  2/3)+cos(tan^-1sqrt3)

Exercise 4.14 | Q 2.01 | Page 115

2sin^-1  3/5=tan^-1  24/7

Exercise 4.14 | Q 2.02 | Page 115

tan^-1  1/4+tan^-1  2/9=1/2cos^-1  3/2=1/2sin^-1(4/5)

Exercise 4.14 | Q 2.03 | Page 115

tan^-1  2/3=1/2tan^-1  12/5

Exercise 4.14 | Q 2.04 | Page 115

tan^-1  1/7+2tan^-1  1/3=pi/4

Exercise 4.14 | Q 2.05 | Page 115

sin^-1  4/5+2tan^-1  1/3=pi/2

Exercise 4.14 | Q 2.06 | Page 115

2sin^-1  3/5-tan^-1  17/31=pi/4

Exercise 4.14 | Q 2.07 | Page 115

2tan^-1  1/5+tan^-1  1/8=tan^-1  4/7

Exercise 4.14 | Q 2.08 | Page 115

2tan^-1  3/4-tan^-1  17/31=pi/4

Exercise 4.14 | Q 2.09 | Page 115

2tan^-1(1/2)+tan^-1(1/7)=tan^-1(31/17)

Exercise 4.14 | Q 2.1 | Page 115

4tan^-1  1/5-tan^-1  1/239=pi/4

Exercise 4.14 | Q 3 | Page 115

If sin^-1  (2a)/(1+a^2)-cos^-1  (1-b^2)/(1+b^2)=tan^-1  (2x)/(1-x^2), then prove that x=(a-b)/(1+ab)

Exercise 4.14 | Q 4.1 | Page 115

Prove that

tan^-1((1-x^2)/(2x))+cot^-1((1-x^2)/(2x))=pi/2

Exercise 4.14 | Q 4.2 | Page 115

Prove that

sin{tan^-1  (1-x^2)/(2x)+cos^-1  (1-x^2)/(2x)}=1

Exercise 4.14 | Q 5 | Page 115

If sin^-1  (2a)/(1+a^2)+sin^-1  (2b)/(1+b^2)=2tan^-1x, Prove that  x=(a+b)/(1-ab).

Exercise 4.14 | Q 6 | Page 115

Show that 2tan^-1x+sin^-1  (2x)/(1+x^2) is constant for x ≥ 1, find that constant.

Exercise 4.14 | Q 7.1 | Page 116

Find the value of the following:

tan^-1{2cos(2sin^-1  1/2)}

Exercise 4.14 | Q 7.2 | Page 116

Find the value of the following:

cos(sec^-1x+\text(cosec)^-1x), | x | ≥ 1

Exercise 4.14 | Q 8.1 | Page 116

Solve the following equation for x:

tan^-1  1/4+2tan^-1  1/5+tan^-1  1/6+tan^-1  1/x=pi/4

Exercise 4.14 | Q 8.2 | Page 116

Solve the following equation for x:

3sin^-1  (2x)/(1+x^2)-4cos^-1  (1-x^2)/(1+x^2)+2tan^-1  (2x)/(1-x^2)=pi/3

Exercise 4.14 | Q 8.3 | Page 116

Solve the following equation for x:

tan^-1((2x)/(1-x^2))+cot^-1((1-x^2)/(2x))=(2pi)/3,x>0

Exercise 4.14 | Q 8.4 | Page 116

Solve the following equation for x:

2tan^-1(sinx)=tan^-1(2sinx),x!=pi/2

Exercise 4.14 | Q 8.5 | Page 116

Solve the following equation for x:

cos^-1((x^2-1)/(x^2+1))+1/2tan^-1((2x)/(1-x^2))=(2x)/3

Exercise 4.14 | Q 8.6 | Page 116

Solve the following equation for x:

tan^-1((x-2)/(x-1))+tan^-1((x+2)/(x+1))=pi/4

Exercise 4.14 | Q 9 | Page 116

Prove that 2tan^-1(sqrt((a-b)/(a+b))tan  theta/2)=cos^-1((a costheta+b)/(a+b costheta))

Exercise 4.14 | Q 10 | Page 116

Prove that:

tan^-1  (2ab)/(a^2-b^2)+tan^-1  (2xy)/(x^2-y^2)=tan^-1  (2alphabeta)/(alpha^2-beta^2),   where alpha=ax-by  and  beta=ay+bx.

Exercise 4.14 | Q 11 | Page 116

For any a, b, x, y > 0, prove that:

2/3tan^-1((3ab^2-a^3)/(b^3-3a^2b))+2/3tan^-1((3xy^2-x^3)/(y^3-3x^2y))=tan^-1  (2alphabeta)/(alpha^2-beta^2)

where  alpha =-ax+by, beta=bx+ay

Exercise 4.15 [Pages 116 - 119]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.15 [Pages 116 - 119]

Exercise 4.15 | Q 1 | Page 116

Write the value of sin^-1((-sqrt3)/2)+cos^-1((-1)/2)

Exercise 4.15 | Q 2 | Page 116

Write the difference between maximum and minimum values of  sin−1 x for x ∈ [− 1, 1].

Exercise 4.15 | Q 3 | Page 116

If sin^-1x+sin^-1y+sin^-1z=(3pi)/2,  then write the value of x + y + z.

Exercise 4.15 | Q 4 | Page 117

If x > 1, then write the value of sin−1 ((2x)/(1+x^2)) in terms of tan−1 x.

Exercise 4.15 | Q 5 | Page 117

If x < 0, then write the value of cos−1 ((1-x^2)/(1+x^2)) in terms of tan−1 x.

Exercise 4.15 | Q 6 | Page 117

Write the value of tan1x + tan−1 (1/x)for x > 0.

Exercise 4.15 | Q 7 | Page 117

Write the value of tan1 x + tan−1 (1/x)  for x < 0.

Exercise 4.15 | Q 8 | Page 117

What is the value of cos−1 (cos  (2x)/3)+sin^-1(sin  (2x)/3)?

Exercise 4.15 | Q 9 | Page 117

If −1 < x < 0, then write the value of sin^-1((2x)/(1+x^2))+cos^-1((1-x^2)/(1+x^2))

Exercise 4.15 | Q 10 | Page 117

Write the value of sin (cot−1 x).

Exercise 4.15 | Q 11 | Page 117

Write the value of

$\cos^{- 1} \left( \frac{1}{2} \right) + 2 \sin^{- 1} \left( \frac{1}{2} \right)$.

Exercise 4.15 | Q 12 | Page 117

Write the range of tan−1 x.

Exercise 4.15 | Q 13 | Page 117

Write the value of cos−1 (cos 1540°).

Exercise 4.15 | Q 14 | Page 117

Write the value of sin−1

$\left( \sin( -{600}°) \right)$.

Exercise 4.15 | Q 15 | Page 117

Write the value of cos$\left( 2 \sin^{- 1} \frac{1}{3} \right)$

Exercise 4.15 | Q 16 | Page 117

Write the value of sin1 (sin 1550°).

Exercise 4.15 | Q 17 | Page 117

Evaluate sin

$\left( \frac{1}{2} \cos^{- 1} \frac{4}{5} \right)$

Exercise 4.15 | Q 18 | Page 117

Evaluate sin $\left( \tan^{- 1} \frac{3}{4} \right)$

Exercise 4.15 | Q 19 | Page 117

Write the value of cos−1 $\left( \tan\frac{3\pi}{4} \right)$

Exercise 4.15 | Q 20 | Page 117

Write the value of cos $\left( 2 \sin^{- 1} \frac{1}{2} \right)$

Exercise 4.15 | Q 21 | Page 117

Write the value of cos1 (cos 350°) − sin−1 (sin 350°)

Exercise 4.15 | Q 22 | Page 117

Write the value of cos$\left( \frac{1}{2} \cos^{- 1} \frac{3}{5} \right)$

Exercise 4.15 | Q 23 | Page 117

If tan−1 x + tan−1 y = pi/4,  then write the value of x + y + xy.

Exercise 4.15 | Q 24 | Page 117

Write the value of cos−1 (cos 6).

Exercise 4.15 | Q 25 | Page 117

Write the value of sin−1 $\left( \cos\frac{\pi}{9} \right)$

Exercise 4.15 | Q 26 | Page 117

Write the value of sin $\left\{ \frac{\pi}{3} - \sin^{- 1} \left( - \frac{1}{2} \right) \right\}$

Exercise 4.15 | Q 27 | Page 117

Write the value of tan1$\left\{ \tan\left( \frac{15\pi}{4} \right) \right\}$

Exercise 4.15 | Q 28 | Page 118

Write the value ofWrite the value of $2 \sin^{- 1} \frac{1}{2} + \cos^{- 1} \left( - \frac{1}{2} \right)$

Exercise 4.15 | Q 29 | Page 118

Write the value of $\tan^{- 1} \frac{a}{b} - \tan^{- 1} \left( \frac{a - b}{a + b} \right)$

Exercise 4.15 | Q 30 | Page 118

Write the value of cos−1 $\left( \cos\frac{5\pi}{4} \right)$

Exercise 4.15 | Q 31 | Page 118

Show that $\sin^{- 1} (2x\sqrt{1 - x^2}) = 2 \sin^{- 1} x$

Exercise 4.15 | Q 32 | Page 118

Evaluate: $\sin^{- 1} \left( \sin\frac{3\pi}{5} \right)$

Exercise 4.15 | Q 33 | Page 118

If $\tan^{- 1} (\sqrt{3}) + \cot^{- 1} x = \frac{\pi}{2},$ find x.

Exercise 4.15 | Q 34 | Page 118

If $\sin^{- 1} \left( \frac{1}{3} \right) + \cos^{- 1} x = \frac{\pi}{2},$ then find x.

Exercise 4.15 | Q 35 | Page 118

Write the value of $\sin^{- 1} \left( \frac{1}{3} \right) - \cos^{- 1} \left( - \frac{1}{3} \right)$

Exercise 4.15 | Q 36 | Page 118

If 4 sin−1 x + cos−1 x = π, then what is the value of x?

Exercise 4.15 | Q 37 | Page 118

If x < 0, y < 0 such that xy = 1, then write the value of tan1 x + tan−1 y.

Exercise 4.15 | Q 38 | Page 118

What is the principal value of sin^-1(-sqrt3/2)?

Exercise 4.15 | Q 39 | Page 118

Write the principal value of sin^-1(-1/2)

Exercise 4.15 | Q 40 | Page 118

Write the principal value of $\cos^{- 1} \left( \cos\frac{2\pi}{3} \right) + \sin^{- 1} \left( \sin\frac{2\pi}{3} \right)$

Exercise 4.15 | Q 41 | Page 118

Write the value of $\tan\left( 2 \tan^{- 1} \frac{1}{5} \right)$

Exercise 4.15 | Q 42 | Page 118

Write the principal value of $\tan^{- 1} 1 + \cos^{- 1} \left( - \frac{1}{2} \right)$

Exercise 4.15 | Q 43 | Page 118

Write the value of $\tan^{- 1} \left\{ 2\sin\left( 2 \cos^{- 1} \frac{\sqrt{3}}{2} \right) \right\}$

Exercise 4.15 | Q 44 | Page 118

Write the principal value of tan^-1sqrt3+cot^-1sqrt3

Exercise 4.15 | Q 45 | Page 118

Write the principal value of $\cos^{- 1} \left( \cos680^\circ \right)$

Exercise 4.15 | Q 46 | Page 118

Write the value of $\sin^{- 1} \left( \sin\frac{3\pi}{5} \right)$

Exercise 4.15 | Q 47 | Page 118

Write the value of $\sec^{- 1} \left( \frac{1}{2} \right)$

Exercise 4.15 | Q 48 | Page 118

Write the value of $\cos^{- 1} \left( \cos\frac{14\pi}{3} \right)$

Exercise 4.15 | Q 49 | Page 118

Write the value of $\cos\left( \sin^{- 1} x + \cos^{- 1} x \right), \left| x \right| \leq 1$

Exercise 4.15 | Q 50 | Page 118

Wnte the value of the expression $\tan\left( \frac{\sin^{- 1} x + \cos^{- 1} x}{2} \right), \text { when } x = \frac{\sqrt{3}}{2}$

Exercise 4.15 | Q 51 | Page 119

Write the principal value of $\sin^{- 1} \left\{ \cos\left( \sin^{- 1} \frac{1}{2} \right) \right\}$

Exercise 4.15 | Q 52 | Page 119

The set of values of \text(cosec)^-1(sqrt3/2)

Exercise 4.15 | Q 53 | Page 119

Write the value of  $\tan^{- 1} \left( \frac{1}{x} \right)$  for x < 0 in terms of cot^-1x

Exercise 4.15 | Q 54 | Page 119

Write the value of  cot^-1(-x)  for all x in R in terms of cot^-1(x)

Exercise 4.15 | Q 55 | Page 119

Wnte the value of$\cos\left( \frac{\tan^{- 1} x + \cot^{- 1} x}{3} \right), \text{ when } x = - \frac{1}{\sqrt{3}}$

Exercise 4.15 | Q 56 | Page 119

If $\cos\left( \tan^{- 1} x + \cot^{- 1} \sqrt{3} \right) = 0$ , find the value of x.

Exercise 4.15 | Q 57 | Page 119

Find the value of $2 \sec^{- 1} 2 + \sin^{- 1} \left( \frac{1}{2} \right)$

Exercise 4.15 | Q 58 | Page 119

If $\cos\left( \sin^{- 1} \frac{2}{5} + \cos^{- 1} x \right) = 0$, find the value of x.

Exercise 4.15 | Q 59 | Page 119

Find the value of $\cos^{- 1} \left( \cos\frac{13\pi}{6} \right)$

Exercise 4.15 | Q 60 | Page 119

Find the value of $\tan^{- 1} \left( \tan\frac{9\pi}{8} \right)$

Exercise 4.16 [Pages 119 - 122]

### RD Sharma solutions for Class 12 Maths Chapter 4 Inverse Trigonometric Functions Exercise 4.16 [Pages 119 - 122]

Exercise 4.16 | Q 1 | Page 119

If $\tan^{- 1} \left( \frac{\sqrt{1 + x^2} - \sqrt{1 - x^2}}{\sqrt{1 + x^2} + \sqrt{1 - x^2}} \right)$  = α, then x2 =

• sin 2 α

• sin α

• cos 2 α

• cos α

Exercise 4.16 | Q 2 | Page 120

The value of tan $\left\{ \cos^{- 1} \frac{1}{5\sqrt{2}} - \sin^{- 1} \frac{4}{\sqrt{17}} \right\}$ is

• sqrt29/3

• 29/3

• sqrt3/29

• 3/29

Exercise 4.16 | Q 3 | Page 120

2 tan−1 {cosec (tan−1 x) − tan (cot1 x)} is equal to

• cot−1 x

• cot−11/x

• tan−1 x

• none of these

Exercise 4.16 | Q 4 | Page 120

If  $\cos^{- 1} \frac{x}{a} + \cos^{- 1} \frac{y}{b} = \alpha, then\frac{x^2}{a^2} - \frac{2xy}{ab}\cos \alpha + \frac{y^2}{b^2} =$

• sin2 α

• cos2 α

• tan2 α

• cot2 α

Exercise 4.16 | Q 5 | Page 120

The positive integral solution of the equation
$\tan^{- 1} x + \cos^{- 1} \frac{y}{\sqrt{1 + y^2}} = \sin^{- 1} \frac{3}{\sqrt{10}}\text{ is }$

•  x = 1, y = 2

•  x = 2, y = 1

•  x = 3, y = 2

• x = −2, y = −1

Exercise 4.16 | Q 6 | Page 120

If sin−1 − cos−1 x = pi/6 , then x =

• 1/2

• sqrt3/2

• -1/2

• none of these

Exercise 4.16 | Q 7 | Page 120

sin$\left[ \cot^{- 1} \left\{ \tan\left( \cos^{- 1} x \right) \right\} \right]$  is equal to

• x

• sqrt(1-x^2

• 1/x

• none of these

Exercise 4.16 | Q 8 | Page 120

The number of solutions of the equation $\tan^{- 1} 2x + \tan^{- 1} 3x = \frac{\pi}{4}$ is

• 2

• 3

• 1

• none of these

Exercise 4.16 | Q 9 | Page 120

If α = $\tan^{- 1} \left( \tan\frac{5\pi}{4} \right) \text{ and }\beta = \tan^{- 1} \left( - \tan\frac{2\pi}{3} \right)$ , then

• 4 α = 3 β

• 3 α = 4 β

• α − β = (7pi)/12

• none of these

Exercise 4.16 | Q 10 | Page 120

The number of real solutions of the equation $\sqrt{1 + \cos 2x} = \sqrt{2} \sin^{- 1} (\sin x), - \pi \leq x \leq \pi$

• 0

• 1

• 2

• infinite

Exercise 4.16 | Q 11 | Page 120

If x < 0, y < 0 such that xy = 1, then tan−1 x + tan−1 y equals

• pi/2

• -pi/2

• − π

• none of these

Exercise 4.16 | Q 12 | Page 120

$\text{ If } u = \cot^{- 1} \sqrt{\tan \theta} - \tan^{- 1} \sqrt{\tan \theta}\text{ then }, \tan\left( \frac{\pi}{4} - \frac{u}{2} \right) =$

• sqrt(tantheta

• sqrt(cottheta)

•  tan θ

• cot θ

Exercise 4.16 | Q 13 | Page 120

$\text{ If }\cos^{- 1} \frac{x}{3} + \cos^{- 1} \frac{y}{2} = \frac{\theta}{2}, \text{ then }4 x^2 - 12xy \cos\frac{\theta}{2} + 9 y^2 =$

• 36

• 36 − 36 cos θ

• 18 − 18 cos θ

• 18 + 18 cos θ

Exercise 4.16 | Q 14 | Page 120

If α = $\tan^{- 1} \left( \frac{\sqrt{3}x}{2y - x} \right), \beta = \tan^{- 1} \left( \frac{2x - y}{\sqrt{3}y} \right),$
then α − β =

• pi/6

• pi/3

• pi/2

• -pi/3

Exercise 4.16 | Q 15 | Page 121

Let f (x) = e^(cos^-1){sin(x+pi/3}.
Then, f (8π/9) =

• e5π/18

•  e13π/18

• e−2π/18

• none of these

Exercise 4.16 | Q 16 | Page 121

$\tan^{- 1} \frac{1}{11} + \tan^{- 1} \frac{2}{11}$  is equal to

• 0

• 1/2

• − 1

• none of these

Exercise 4.16 | Q 17 | Page 121

If $\cos^{- 1} \frac{x}{2} + \cos^{- 1} \frac{y}{3} = \theta,$  then 9x2 − 12xy cos θ + 4y2 is equal to

• 36

•  −36 sin2 θ

• 36 sin2 θ

• 36 cos2 θ

Exercise 4.16 | Q 18 | Page 121

If tan−1 3 + tan−1 x = tan−1 8, then x =

• 5

• 1/5

• 5/14

• 14/5

Exercise 4.16 | Q 19 | Page 121

The value of $\sin^{- 1} \left( \cos\frac{33\pi}{5} \right)$ is

• (3pi)/5

• -pi/10

• pi/10

• (7pi)/5

Exercise 4.16 | Q 20 | Page 121

The value of $\cos^{- 1} \left( \cos\frac{5\pi}{3} \right) + \sin^{- 1} \left( \sin\frac{5\pi}{3} \right)$ is

• pi/2

• (5pi)/3

• (10pi)/3

• 0

Exercise 4.16 | Q 21 | Page 121

sin $\left\{ 2 \cos^{- 1} \left( \frac{- 3}{5} \right) \right\}$  is equal to

• 6/25

• 24/25

• 4/5

• -24/25

Exercise 4.16 | Q 22 | Page 121

If θ = sin−1 {sin (−600°)}, then one of the possible values of θ is

• pi/3

• pi/2

• (2pi)/3

• -(2pi)/3

Exercise 4.16 | Q 23 | Page 121

If $3\sin^{- 1} \left( \frac{2x}{1 + x^2} \right) - 4 \cos^{- 1} \left( \frac{1 - x^2}{1 + x^2} \right) + 2 \tan^{- 1} \left( \frac{2x}{1 - x^2} \right) = \frac{\pi}{3}$ is equal to

• 1/sqrt3

• -1/sqrt3

• sqrt3

• -sqrt3/4

Exercise 4.16 | Q 24 | Page 121

If 4 cos−1 x + sin−1 x = π, then the value of x is

• 2/3

• 1/sqrt2

• sqrt3/2

• 2/sqrt3

Exercise 4.16 | Q 25 | Page 121

It $\tan^{- 1} \frac{x + 1}{x - 1} + \tan^{- 1} \frac{x - 1}{x} = \tan^{- 1}$   (−7), then the value of x is

• 0

• −2

• 1

• 2

Exercise 4.16 | Q 26 | Page 121

If $\cos^{- 1} x > \sin^{- 1} x$, then

• $\frac{1}{\sqrt{2}} < x \leq 1$

•  $0 \leq x < \frac{1}{\sqrt{2}}$

•  $- 1 \leq x < \frac{1}{\sqrt{2}}$

•  x > 0

Exercise 4.16 | Q 27 | Page 121

In a ∆ ABC, if C is a right angle, then
$\tan^{- 1} \left( \frac{a}{b + c} \right) + \tan^{- 1} \left( \frac{b}{c + a} \right) =$

• pi/3

• pi/4

• (5x)/2

• pi/6

Exercise 4.16 | Q 28 | Page 121

The value of sin $\left( \frac{1}{4} \sin^{- 1} \frac{\sqrt{63}}{8} \right)$ is

• 1/sqrt2

• 1/sqrt3

• 1/(2sqrt2)

• 1/(3sqrt3)

Exercise 4.16 | Q 29 | Page 122

$\cot\left( \frac{\pi}{4} - 2 \cot^{- 1} 3 \right) =$

• 7

• 6

• 5

• none of these

Exercise 4.16 | Q 30 | Page 122

If tan−1 (cot θ) = 2 θ, then θ =

• +-pi/3

• +-pi/4

• +-pi/6

• none of these

Exercise 4.16 | Q 31 | Page 122

If $\sin^{- 1} \left( \frac{2a}{1 - a^2} \right) + \cos^{- 1} \left( \frac{1 - a^2}{1 + a^2} \right) = \tan^{- 1} \left( \frac{2x}{1 - x^2} \right),\text{ where }a, x \in \left( 0, 1 \right)$ , then, the value of x is

• 0

• a/2

•  a

• (2a)/(1-a^2)

Exercise 4.16 | Q 32 | Page 122

The value of  $\sin\left( 2\left( \tan^{- 1} 0 . 75 \right) \right)$ is equal to

• 0.75

• 1.5

• 0.96

• sin^-1 1.5

Exercise 4.16 | Q 33 | Page 122

If > 1, then $2 \tan^{- 1} x + \sin^{- 1} \left( \frac{2x}{1 + x^2} \right)$ is equal to

• 4tan^-1x

• 0

• pi/2

•  π

Exercise 4.16 | Q 34 | Page 122

The domain of  $\cos^{- 1} \left( x^2 - 4 \right)$ is

• [3, 5]

• [−1, 1]

•  $\left[ - \sqrt{5}, - \sqrt{3} \right] \cup \left[ \sqrt{3}, \sqrt{5} \right]$

•  $\left[ - \sqrt{5}, - \sqrt{3} \right] \cap \left[ \sqrt{3}, \sqrt{5} \right]$

Exercise 4.16 | Q 35 | Page 122

The value of $\tan\left( \cos^{- 1} \frac{3}{5} + \tan^{- 1} \frac{1}{4} \right)$

• 19/8

• 8/19

• 19/12

• 3/4

## Chapter 4: Inverse Trigonometric Functions

Exercise 4.1Exercise 4.2Exercise 4.3Exercise 4.4Exercise 4.5Exercise 4.6Exercise 4.7Exercise 4.8Exercise 4.9Exercise 4.11Exercise 4.12Exercise 4.13Exercise 4.14Exercise 4.15Exercise 4.16

## RD Sharma solutions for Class 12 Maths chapter 4 - Inverse Trigonometric Functions

RD Sharma solutions for Class 12 Maths chapter 4 (Inverse Trigonometric Functions) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Class 12 Maths solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. RD Sharma textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 12 Maths chapter 4 Inverse Trigonometric Functions are Inverse Trigonometric Functions (Simplification and Examples), Properties of Inverse Trigonometric Functions, Graphs of Inverse Trigonometric Functions, Inverse Trigonometric Functions - Principal Value Branch, Basic Concepts of Trigonometric Functions.

Using RD Sharma Class 12 solutions Inverse Trigonometric Functions exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in RD Sharma Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 12 prefer RD Sharma Textbook Solutions to score more in exam.

Get the free view of chapter 4 Inverse Trigonometric Functions Class 12 extra questions for Class 12 Maths and can use Shaalaa.com to keep it handy for your exam preparation