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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)((b+acosx)/(a+bcosx))`

B

`Cos^(-1)((b+acosx)/(a-bcosx))`

C

`Cos^(-1)((b-acosx)/(a+bcosx))`

D

`Cos^(-1)((b-acosx)/(a-bcosx))`

Text Solution

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The correct Answer is:
A
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