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If int tan^(5)x dx=Atan^(4)x+Btan^(2)x+g...

If `int tan^(5)x `dx`=Atan^(4)x+Btan^(2)x+g(x)+C`, where C is constant of integration and `g(0)=0, ` then

A

`A=1/4`

B

`B=-1/2`

C

`g(x)=ln|secx|`

D

`B=1/2`

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