If tan^(-1). (sqrt((1+x^(2))) - sqrt((1-...

If `tan^(-1). (sqrt((1+x^(2))) - sqrt((1-x^(2))))/(sqrt((1+x^(2)))+sqrt((1-x^(2))))=alpha" , then " x^(2) ` is

A

` cos 2 alpha `

B

` sin 2 alpha `

C

` tan 2 alpha `

D

` cot 2 alpha `

Verified by Experts

The correct Answer is:

B

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