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f:(-1,1) to B defined by f(x)=tan^(-1)(...

`f:(-1,1) to B` defined by `f(x)=tan^(-1)((2x)/(1-x^(2)))` is bijection then B =

A

`[-pi/4, pi/4]`

B

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

C

`(-pi/2,pi/4]`

D

`[pi/4, pi/2]`

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A
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