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Let f (x) = 7 tan ^(8) x + 7 tan ^(6) x ...

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

A

`int _( 0 ) ^(pi//4) x f ( 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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A, B
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