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The value of the integral int(-pi)^(pi)(...

The value of the integral `int_(-pi)^(pi)(cos^(2)x)/(1+a^(x))"dx"`, where `a gt 0`, is -

A

`pi`

B

`a pi`

C

`pi/2`

D

`2pi`

Text Solution

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The correct Answer is:
C
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