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int(-pi//2)^(pi//2)cosxln((1+x)/(1-x))dx...

`int_(-pi//2)^(pi//2)cosxln((1+x)/(1-x))dx` is equal to

A

0

B

`pi^(2)/4(-1+pi/2)`

C

1

D

`pi^(2)/2`

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