Find the simplest value of f(x)=tan^-1 ...

Find the simplest value of `f(x)=tan^-1 ((sqrt(1+x^2)-1)/x),x in R - {0}`

A

`tan^(-1)x`

B

`2 sec^(-1)x`

C

`(1)/(2)tan^(-1)x`

D

`sec^(-1)x`

Verified by Experts

The correct Answer is:

C

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