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Let f(x)=7tan^8x+7tan^6x-3tan^4x-3tan^2x...

Let `f(x)=7tan^8x+7tan^6x-3tan^4x-3tan^2x` for all `x in (-pi/2, pi/2)`. The correct expression(s) is (are)

A

`int_0^(pi//4)xf(x).dx=1/12`

B

`int_0^(pi//4)f(x)dx=0`

C

`int_0^(pi//4)xf(x).dx=1/6`

D

`int_0^(pi//4)f(x).dx=1`

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