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Mathematics 8 Online
OpenStudy (anonymous):

f(x)=4(sin2x)^3 a. Derive trig identity giving sin^3theta in terms of sin(theta) and sin(3*theta) using DeMoivre's formula. b. Find the Fourier series of f(x)=4(sin2x)^3 on [0,2pi] without computing any integrals.

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