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IF tan^-1(1+x)+tan^-1(1-x)=pi/2, then th...

IF `tan^-1(1+x)+tan^-1(1-x)=pi/2`, then the value of x is: a)0 b)1 c)-1 d)`pi`

A

0

B

1

C

`-1`

D

`pi`

Text Solution

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The correct Answer is:
A
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