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If tan^(-1)((1-x)/(1+x))=1/2tan^(-1)x,xg...

If `tan^(-1)((1-x)/(1+x))=1/2tan^(-1)x,xgt0` find x

A

`sqrt3`

B

1

C

`-1`

D

`1/sqrt3`

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The correct Answer is:
D
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