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Prove that 2tan^(-1)(sqrt((a-b)/(a+b))ta...

Prove that `2tan^(-1)(sqrt((a-b)/(a+b))tantheta/2)=cos^(-1)((acostheta+b)/(a+bcostheta))`

A

`"cos"^(-1)((a "cos" theta+b)/(a+b "cos" theta))`

B

`"cos"^(-1)((a+b co theta)/(a "cos" theta+b))`

C

`"cos"^(-1)((a "cos" theta)/(a+b "cos" theta))`

D

`"cos"^(-1)((b "cos" theta)/(a "cos" theta+b))`

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The correct Answer is:
A
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DISHA PUBLICATION-INVERSE TRIGONOMETIC FUNCTIONS-EXERCISE - 1: (CONCEPT BUILDER)
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