Evaluate the following : int(0)^(1)(1-...

Evaluate the following :
`int_(0)^(1)(1-x^(2))/(1+x^(2))dx`

A

`pi/2 - 1`

B

`pi/2+ 1`

C

`pi/4 -1`

D

`pi/4 +1`

Verified by Experts

The correct Answer is:

A

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