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2Tan^(-1)((sqrt(a-b))/(a+b)"tan"x/2)=...

`2Tan^(-1)((sqrt(a-b))/(a+b)"tan"x/2)=`

A

`cos^(-1)((acostheta+b)/(a+bcostheta))`

B

`cos^(-1)((a+bcostheta)/(acostheta+b))`

C

`cos^(-1)((acostheta)/(a+bcostheta))`

D

`cos^(-1)((bcostheta)/(acostheta+b))`

Text Solution

Verified by Experts

The correct Answer is:
A
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