d/dx(tan^(1)(sqrt(1+x^2)-1)/x) is equal ...

`d/dx(tan^(_1)(sqrt(1+x^2)-1)/x)` is equal to :

A

`1/(1+x^2)`

B

`x^2/(2 sqrt(1+x^2)(sqrt(1+x^2)-1))`

C

`2/(1+x^2)`

D

`1/(2(1+x^2))`

Verified by Experts

The correct Answer is:

D

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