Q.

The Fourier series for the function f (x) = sin2x is                              

A. 0.5 + 0.5 sin 2x
B. 0.5 – 0.5 sin 2x
C. 0.5 + 0.5 cos 2x
D. 0.5 – 0.5 cos 2x
Answer» D. 0.5 – 0.5 cos 2x
Explanation: f(x) = sin2x now, f(x) = sin2x =  1−cos2x
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