The value of int(-1)^1cot^-1((x+x^3+x^5)...

The value of `int_(-1)^1cot^-1((x+x^3+x^5)/(x^4+x^2+1))` dx is equal to

A

`pi/2`

B

`pi/4`

C

`(3pi)/4`

D

`pi`

Verified by Experts

The correct Answer is:

D

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