If f(n)(x) = (sin x)/(cos3x)+(sin 3x)/(c...

If `f_(n)(x) = (sin x)/(cos3x)+(sin 3x)/(cos 3^(2)x) +(sin 3^(2)x)/(cos 3^(3)x) +....+ (sin 3^(n-1)x)/(cos 3^(n)x)"Then" f_(2) ((pi)/(4)) + f_(3) ((pi)/(4))=`

A

0

B

1

C

-1

D

2

Verified by Experts

The correct Answer is:

C

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