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If cos^(-1) ((1-a^(2))/(1+a^(2)))- cos^(...

If `cos^(-1) ((1-a^(2))/(1+a^(2)))- cos^(-1) ((1-b^(2))/(1+b^(2))) = 2 tan^(-1) x`, then x is

A

` (a-b)/(1 + ab) `

B

` (b-a)/(1+ ab) `

C

` (a+b)/(1- ab) `

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
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