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Let f(0)=f(0)=0 and f^(primeprime)(x)=se...

Let `f(0)=f(0)=0 and f^(primeprime)(x)=sec^4x+4` then

A

`f((pi)/(4))=(1)/(3)log2+(1)/(6)+(pi^(2))/(8)`

B

`f(-(pi)/(4))=(1)/(3)log2+(1)/(6)+(pi^(2))/(8)`

C

`f(x)=(2)/(3)log|cosx|+(1)/(6)tan^(2)x+2x^(2)`

D

`f(x)=(2)/(3)log|cosx|-(1)/(6)tan^(2)x+2x^(2)`

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