हिंदी

The Value of (1 + Cot θ − Cosec θ) (1 + Tan θ + Sec θ) is - Mathematics

Advertisements
Advertisements

प्रश्न

The value of (1 + cot θ − cosec θ) (1 + tan θ + sec θ) is 

विकल्प

  • 1

  • 2

  • 4

  • 0

MCQ
Advertisements

उत्तर

The given expression is 

`(1+cot θ-cosec θ )(1+tan θ+sec θ)`

Simplifying the given expression, we have 

`(1+cot θ-cosec θ)(1+tan θ+sec θ)` 

=`(1+cos θ/sin θ-1/sin θ)(1+sin θ/cos θ+1/cos θ)`

= `(sin θ+cos θ-1)/sin θxx (cos θ+sin θ+1)/cos θ` 

= `((sin θ+cos θ-1)(cos θ+sin θ+1))/(sin θcos θ)` 

=`({(sin θ+cos θ)-1}{(sin θ+cos θ)+1})/(sin θ cos θ)`

=`((sin θ+cos θ)^2-(1)^2)/(sin θ cos θ)`

=`((sin θ+cos θ)^2-(1)^2)/(sin θ cos θ)` 

=`((sin^2 θ+cos^2θ+2 sin θcos θ)-1)/(sin θ cos θ)` 

=`((sin ^2θ+cos^2θ)+2 sinθ cos θ-1)/(sin θcos θ)` 

= `(1+2 sin θ cosθ-1)/(sinθ cos θ)` 

=`( 2 sin θ cos θ)/(sin θ cos θ)` 

=`2`

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 11: Trigonometric Identities - Exercise 11.4 [पृष्ठ ५७]

APPEARS IN

आरडी शर्मा Mathematics [English] Class 10
अध्याय 11 Trigonometric Identities
Exercise 11.4 | Q 9 | पृष्ठ ५७

संबंधित प्रश्न

Prove that `\frac{\sin \theta -\cos \theta }{\sin \theta +\cos \theta }+\frac{\sin\theta +\cos \theta }{\sin \theta -\cos \theta }=\frac{2}{2\sin^{2}\theta -1}`


Prove the following trigonometric identities.

`(sec A - tan A)/(sec A + tan A) = (cos^2 A)/(1 + sin A)^2`


Prove the following trigonometric identities.

`(cot A - cos A)/(cot A + cos A) = (cosec A - 1)/(cosec A + 1)`


Prove that:

`(cos^3A + sin^3A)/(cosA + sinA) + (cos^3A - sin^3A)/(cosA - sinA) = 2`


If`( 2 sin theta + 3 cos theta) =2 , " prove that " (3 sin theta - 2 cos theta) = +- 3.`


If `cos theta = 7/25 , "write the value of" ( tan theta + cot theta).`


\[\frac{\tan \theta}{\sec \theta - 1} + \frac{\tan \theta}{\sec \theta + 1}\] is equal to 

 

 


Prove that: 
(cosec θ - sinθ )(secθ - cosθ ) ( tanθ +cot θ) =1


Prove the following identity :

sinθcotθ + sinθcosecθ = 1 + cosθ  


Prove the following identity : 

`sin^2Acos^2B - cos^2Asin^2B = sin^2A - sin^2B`


Prove the following identity : 

`sinA/(1 + cosA) + (1 + cosA)/sinA = 2cosecA`


Prove the following identity : 

`sqrt(cosec^2q - 1) = "cosq  cosecq"`


Prove the following identity : 

`tan^2A - tan^2B = (sin^2A - sin^2B)/(cos^2Acos^2B)`


If x = r sinA cosB , y = r sinA sinB and z = r cosA , prove that   `x^2 + y^2 + z^2 = r^2`


If x = a sec θ + b tan θ and y = a tan θ + b sec θ prove that x2 - y2 = a2 - b2.


If x sin3θ + y cos3 θ = sin θ cos θ  and x sin θ = y cos θ , then show that x2 + y2 = 1.


If a cos θ – b sin θ = c, then prove that (a sin θ + b cos θ) = `±  sqrt("a"^2 + "b"^2 -"c"^2)`


Prove that

`(cot "A" + "cosec  A" - 1)/(cot"A" - "cosec  A" + 1) = (1 + cos "A")/"sin A"`


If 1 + sin2θ = 3 sin θ cos θ, then prove that tan θ = 1 or `1/2`.


(sec2 θ – 1) (cosec2 θ – 1) is equal to ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×