If f (x)= sqrt((1+ sin ^(-1) x)/(1- tan ...

If `f (x)= sqrt((1+ sin ^(-1) x)/(1- tan ^(-1)x)),` then `f '(0)` is equal to:

A

`-1`

B

0

C

1

D

2

Verified by Experts

The correct Answer is:

A

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