Let f : (-1, 1) rarr B be function defin...

Let `f : (-1, 1) rarr B` be function defined by `f(x) = tan^(-1)""(2x)/(1-x^2)` then f is both one - one and onto , when B is in the interval

A

`(0,pi/2)`

B

`[0,pi/2)`

C

`[-pi/2,pi/2]`

D

`(-pi/2,pi/2)`

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The correct Answer is:

D

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