If "tan"^(-1) (sqrt(1+x^2)-1)/x=4 , then...

If `"tan"^(-1) (sqrt(1+x^2)-1)/x=4` , then x equals :

A

`x = tan 2^(@)`

B

`x = tan 4^(@)`

C

`x = tan ( 1//4)^(@)`

D

`x = tan 8^(@)`

Verified by Experts

The correct Answer is:

D

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