English

sqrt((1 + cos A)/(1 – cos A) = ?

Advertisements
Advertisements

Question

`sqrt((1 + cos A)/(1 - cos A)` = ?

Options

  • cosec A – cot A

  • cosec A + cot A

  • cosec A cot A

  • sin A tan A

MCQ
Advertisements

Solution

cosec A + cot A

Explanation:

Given expression = `(sqrt(1 + cos A))/(sqrt(1 - cos A)) xx (sqrt(1 + cos A))/(sqrt(1 + cos A))`

= `((1 + cos A))/sqrt(1 - cos^2A)`

= `((1 + cos A))/(sin A)`

= `(1/(sin A) + (cos A)/(sin A))`

= (cosec A + cot A)

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Trigonometric identities - MULTIPLE-CHOICE QUESTIONS (MCQ) [Page 631]

APPEARS IN

R.S. Aggarwal Mathematics [English] Class 10
Chapter 13 Trigonometric identities
MULTIPLE-CHOICE QUESTIONS (MCQ) | Q 9. | Page 631
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×