int(-pi+4)^(pi//4) (tan^(2)x)/(1+a^(x))d...

`int_(-pi+4)^(pi//4) (tan^(2)x)/(1+a^(x))dx` is equal to

A

`(pi+4)/(4)`

B

`(pi-4)/(4)`

C

`(api)/(4)`

D

`(a+pi)/(4)`

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The correct Answer is:

B

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