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Tamil Nadu Board of Secondary EducationHSC Science Class 12

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board chapter 4 - Inverse Trigonometric Functions [Latest edition]

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Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board chapter 4 - Inverse Trigonometric Functions - Shaalaa.com
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Solutions for Chapter 4: Inverse Trigonometric Functions

Below listed, you can find solutions for Chapter 4 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Mathematics - Volume 1 and 2 [English] Class 12 TN Board.


Exercise 4.1Exercise 4.2Exercise 4.3Exercise 4.4Exercise 4.5Exercise 4.6
Exercise 4.1 [Page 137]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.1 [Page 137]

1. (i)Page 137

Find all the values of x such that – 10π ≤ x ≤ 10π and sin x = 0

1. (ii)Page 137

Find all the values of x such that Find all the values of x such that −3π ≤ x ≤ 3π and sin x = −1

2. (i)Page 137

Find the period and amplitude of y = sin 7x

2. (ii)Page 137

Find the period and amplitude of y = `- sin(1/3 x)`

2. (iii)Page 137

Find the period and amplitude of y = 4 sin(– 2x)

3Page 137

Sketch the graph of y = `sin(1/3 x)` for 0 ≤ x ≤ 6π

4. (i)Page 137

Find the value of `sin^-1(sin((2pi)/3))`

4. (ii)Page 137

Find the value of `sin^-1 (sin((5pi)/4))`

5Page 137

For what value of x does sin x = sin–1x?

6. (i)Page 137

Find the domain of the following

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

6. (ii)Page 137

Find the domain of the following

`g(x) = 2sin^-1(2x - 1) - pi/4`

7Page 137

Find the value of `sin^-1(sin  (5pi)/9 cos  pi/9 + cos  (5pi)/9 sin  pi/9)`

Exercise 4.2 [Pages 142 - 143]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.2 [Pages 142 - 143]

1. (i)Page 142

Find all values of x such that – 6π ≤ x ≤ 6π and cos x = 0

1. (ii)Page 142

Find all values of x such that – 5π ≤ x ≤ 5π and cos x = 1

2Page 142

State the reason for  `cos^-1 [cos(- pi/6)] ≠ - pi/6`

3Page 142

Is cos–1(– x) = π – cos–1 true? justify your answer

4Page 142

Find the principal value of `cos^-1 (1/2)`

5. (i)Page 142

Find the value of `2cos^-1 (1/2) + sin^-1 (1/2)`

5. (ii)Page 142

Find the value of `cos^-1(1/2) + sin^-1( - 1)`

5. (iii)Page 142

Find the value of `cos-1 [cos  pi/7 cos  pi/17 - sin  pi/7 sin  pi/17]`

6. (i)Page 143

Find the domain of `f(x) = sin^-1 ((|x| - 2)/3) + cos^-1 ((1 - |x|)/4)`

6. (ii)Page 143

Find the domain of `g(x) = sin^-1x + cos^-1x`

7Page 143

For what value of x, the inequality `pi/2 < cos^-1 (3x - 1) < pi` holds?

8. (i)Page 143

Find the value of `cos[cos^-1 (4/5) + sin^-1(4/5)]`

8. (ii)Page 143

Find the value of `cos^-1(cos((4pi)/3)) + cos^-1 (cos((5pi)/4))`. 

Exercise 4.3 [Pages 147 - 148]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.3 [Pages 147 - 148]

1. (i)Page 147

Find the domain of the following functions:

`tan^-1 (sqrt(9 - x^2))`

1. (ii)Page 147

Find the domain of the following functions:

`1/2 tan^-1 (1 - x^2) - pi/4`

2. (i)Page 147

Find the value of `tan^-1(tan  (5pi)/4)`

2. (ii)Page 147

Find the value of `tan^-1 (tan(- pi/6))`

3. (i)Page 148

Find the value of `tan(tan^-1((7pi)/4))`

3. (ii)Page 148

Find the value of `tan(tan^-1(1947))`

3. (iii)Page 148

Find the value of `tan(tan^-1(- 0.2021))`

4. (i)Page 148

Find the value of `tan(cos^-1 (1/2) - sin^-1 (- 1/2))`

4. (ii)Page 148

Find the value of `sin(tan^-1 (1/2) - cos^-1 (4/5))`

4. (iii)Page 148

Find the value of `cos(sin^-1 (4/5) - tan^-1 (3/4))`

Exercise 4.4 [Pages 154 - 155]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.4 [Pages 154 - 155]

1. (i)Page 154

Find the principal value of `sec^-1 (2/sqrt(3))`

1. (ii)Page 154

Find the principal value of `cot^-1 (sqrt(3))`

1. (iii)Page 154

Find the principal value of `"cosec"^-1 (- sqrt(2))`

2. (i)Page 155

Find the value of `tan^-1 (sqrt(3)) - sec^-1 (- 2)`

2. (ii)Page 155

Find the value of  `sin^-1 (- 1) + cos^-1 (1/2) + cot^-1 (2)`

2. (iii)Page 155

Find the value of  `cot^-1(1) + sin^-1 (- sqrt(3)/2) - sec^-1 (- sqrt(2))`

Exercise 4.5 [Page 166]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.5 [Page 166]

1. (i)Page 166

Find the value, if it exists. If not, give the reason for non-existence

`sin^-1 (cos pi)`

1. (ii)Page 166

Find the value, if it exists. If not, give the reason for non-existence

`tan^-1(sin(- (5pi)/2))`

1. (iii)Page 166

Find the value, if it exists. If not, give the reason for non-existence

`sin^-1 [sin 5]`

2. (i)Page 166

Find the value of the expression in terms of x, with the help of a reference triangle

sin (cos–1(1 – x))

2. (ii)Page 166

Find the value of the expression in terms of x, with the help of a reference triangle

cos (tan–1 (3x – 1))

2. (iii)Page 166

Find the value of the expression in terms of x, with the help of a reference triangle

`tan(sin^-1(x + 1/2))`

3. (i)Page 166

Find the value of `sin^-1[cos(sin^-1 (sqrt(3)/2))]`

3. (ii)Page 166

Find the value of `cot[sin^-1  3/5 + sin^-1  4/5]`

3. (iii)Page 166

Find the value of  `tan(sin^-1  3/5 + cot^-1  3/2)`

4. (i)Page 166

Prove that `tan^-1  2/11 + tan^-1  7/24 = tan^-1  1/2`

4. (ii)Page 166

Prove that `sin^-1  3/5 - cos^-1  12/13 = sin^-1  16/65`

5Page 166

Prove that `tan^-1x + tan^-1y + tan^-1z = tan^-1[(x + y + z - xyz)/(1 - xy - yz - zx)]`

6Page 166

If tan–1x + tan1y + tan1z = π, show that x + y + z = xyz

7Page 166

Prove that `tan^-1x + tan^-1  (2x)/(1 - x^2) = tan^-1  (3x - x^3)/(1 - 3x^2), |x| < 1/sqrt(3)`

8Page 166

Simplify: `tan^-1  x/y - tan^-1  (x - y)/(x + y)`

9. (i)Page 166

Solve: `sin^-1  5/x + sin^-1  12/x = pi/2`

9. (ii)Page 166

Solve: `tan^-1x = cos^-1  (1 - "a"^2)/(1 + "a"^2) - cos^-1  (1 - "b"^2)/(1 + "b"^2), "a" > 0, "b" > 0`

9. (iii)Page 166

Solve: `2tan^-1 (cos x) = tan^-1 (2"cosec"  x)`

9. (iv)Page 166

Solve: `cot^-1 x - cot^-1 (x + 2) = pi/12, x > 0`

10Page 166

Find the number of solutions of the equation `tan^-1 (x - 1) + tan^-1x + tan^-1(x + 1) = tan^-1(3x)`

Exercise 4.6 [Pages 166 - 168]

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board 4 Inverse Trigonometric Functions Exercise 4.6 [Pages 166 - 168]

MCQ

1Page 166

Choose the correct alternative:

The value of sin–1(cos x), 0 ≤ x ≤ π is

  • `pi - x`

  • `x - pi/2`

  • `pi/2 - x`

  • `x - pi`

2Page 166

Choose the correct alternative:

If `sin^-1x + sin^-1y = (2pi)/3` ; then `cos^-1x + cos^-1y` is equal to

  • `(2pi)/3`

  • `pi/3`

  • `pi/6`

  • `pi`

3Page 167

Choose the correct alternative:

`sin^-1  3/5 - cos^-1  13/13 + sec^-1  5/3 - "cosec"^-1  13/12` is equal to

  • `2pi`

  • `pi`

  • 0

  • `tan^-1  12/65`

4Page 167

Choose the correct alternative:

If sin–1x = 2sin1 α has a solution, then

  • `|alpha| ≤ 1/sqrt(2)`

  • `|alpha| ≥ 1/sqrt(2)`

  • `|alpha| < 1/sqrt(2)`

  • `|alpha| > 1/sqrt(2)`

5Page 167

Choose the correct alternative:

`sin^-1(cos x) = pi/2 - x` is valid for

  • `pi ≤ x ≤ 0`

  • 0 ≤ x ≤ π

  • `- pi/2 ≤ x ≤ pi/2`

  • `- pi/4 ≤ x ≤ (3pi)/4`

6Page 167

Choose the correct alternative:

If sin-1 x + sin-1 y + sin-1 z = `(3pi)/2`, the value of show that `x^2017 + y^2018 + z^2019 - 9/(x^101 + y^101 + z^101)` is

  • 0

  • 1

  • 2

  • 3

7Page 167

Choose the correct alternative:

If `cot^-1x = (2pi)/5` for some x ∈ R, the value of tan-1 x is

  • `- pi/10`

  • `pi/5`

  • `pi/10`

  • `- pi/5`

8Page 167

Choose the correct alternative:

The domain of the function defined by f(x) = `sin^-1 sqrt(x - 1)` is

  • [1, 2]

  • [– 1, 1]

  • [0, 1]

  • [– 1, 0]

9Page 167

Choose the correct alternative:

If x = `1/5`, the value of `cos(cos^-1x + 2sin^-1x)` is

  • `- sqrt(24/25)`

  • `sqrt(24/25)`

  • `1/5`

  • `- 1/5`

10Page 167

Choose the correct alternative:

`tan^-1 (1/4) + tan^-1 (2/9)` is equal to

  • `1/2 cos^-1 (3/5)`

  • `1/2 sin^-1 (3/5)`

  • `1/2 tan^-1 (3/5)`

  • `tan^-1 (1/2)`

11Page 167

Choose the correct alternative:

If the function `f(x) = sin^-1 (x^2 - 3)`, then x belongs to

  • [– 1, 1]

  • `[sqrt(2), 2]`

  • `[-2, sqrt(2)] ∪ [sqrt(2), 2]`

  • `[- 2 -sqrt(2)]`

12Page 167

Choose the correct alternative:

If cot–12 and cot13 are two angles of a triangle, then the third angle is

  • `pi/4`

  • `(3pi)/4`

  • `pi/6`

  • `pi/3`

13Page 167

Choose the correct alternative:

`sin^-1 (tan  pi/4) - sin^-1 (sqrt(3/x)) = pi/6`. Then x is a root of the equation

  • x2 – x – 6 = 0

  • x2 – x – 12 = 0

  • x2 + x – 12 = 0

  • x2 + x – 6 = 0

14Page 168

Choose the correct alternative:

sin–1(2 cos2x – 1) + cos1(1 – 2 sin2x) =

  • `pi/2`

  • `pi/3`

  • `pi/4`

  • `pi/6`

15Page 168

Choose the correct alternative:

If `cot^-1(sqrt(sin alpha)) + tan^-1(sqrt(sin alpha))` = u, then cos 2u is equal to

  • tan2α

  • 0

  • – 1

  • tan 2α

16Page 168

Choose the correct alternative:

If |x| ≤ 1, then `2tan^-1x - sin^-1  (2x)/(1 + x^2)` is equal to

  • tan–1x

  • sin1x

  • 0

  • π

17Page 168

Choose the correct alternative:

The equation tan–1x – cot1x = `tan^-1 (1/sqrt(3))` has

  • no solution

  • unique solution

  • two solutions

  • infinite number of solutions

18Page 168

Choose the correct alternative:

If `sin^-1x + cot^-1 (1/2) = pi/2`, then x is equal to

  • `1/2`

  • `1/sqrt(5)`

  • `2/sqrt(5)`

  • `sqrt(3)/5`

19Page 168

Choose the correct alternative:

If `sin^-1x + "cosec"^-1  5/4 = pi/2`, then the value of x is

  • 4

  • 5

  • 2

  • 3

20Page 168

Choose the correct alternative:

sin(tan–1x), |x| < 1 is equal to

  • `x/sqrt(1 - x^2)`

  • `1/sqrt(1 - x^2)`

  • `1/sqrt(1 + x^2)`

  • `x/sqrt(1 + x^2)`

Solutions for 4: Inverse Trigonometric Functions

Exercise 4.1Exercise 4.2Exercise 4.3Exercise 4.4Exercise 4.5Exercise 4.6
Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board chapter 4 - Inverse Trigonometric Functions - Shaalaa.com

Samacheer Kalvi solutions for Mathematics - Volume 1 and 2 [English] Class 12 TN Board chapter 4 - Inverse Trigonometric Functions

Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Mathematics - Volume 1 and 2 [English] Class 12 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Mathematics - Volume 1 and 2 [English] Class 12 TN Board Tamil Nadu Board of Secondary Education 4 (Inverse Trigonometric Functions) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.

Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Samacheer Kalvi textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.

Concepts covered in Mathematics - Volume 1 and 2 [English] Class 12 TN Board chapter 4 Inverse Trigonometric Functions are Inverse Trigonometric Functions, Some Fundamental Concepts, Sine Function and Inverse Sine Function, The Cosine Function and Inverse Cosine Function, The Tangent Function and the Inverse Tangent Function, The Cosecant Function and the Inverse Cosecant Function, The Secant Function and Inverse Secant Function, The Cotangent Function and the Inverse Cotangent Function, Properties of Inverse Trigonometric Functions.

Using Samacheer Kalvi Mathematics - Volume 1 and 2 [English] Class 12 TN Board solutions Inverse Trigonometric Functions exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Mathematics - Volume 1 and 2 [English] Class 12 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.

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