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Solve for x tan^(-1) ((1-x)/(1+x))=(1)/(...

Solve for x `tan^(-1) ((1-x)/(1+x))=(1)/(2) tan^(-1)x, x gt 0`

A

`sqrt3`

B

1

C

minus 1

D

`1/sqrt3`

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The correct Answer is:
D
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