Question: Fourier series question _ Ly, 'J ______-. (a) Find the Fourier series for cos3 (9), which will be a trigonometric polynomial. (b) Use trig identities

Fourier series question

_ Ly, 'J ______-. (a) Find the Fourier series for cos3 (9), which will be a trigonometric polynomial. (b) Use trig identities to verify that cos3(9) equals your answer to part (a)

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