Question: Expand the function f (x) = sinx as a cosine series in the interval (0, 7). Hint: Find the Fourier coefficients a, and a,

Expand the function f (x) = sinx as a cosine series in

Expand the function f (x) = sinx as a cosine series in the interval (0, 7). Hint: Find the Fourier coefficients a, and a, only and then write Fourier series. cos 2x + cos 4x + cos 6x +| Answer: sin x 15 35

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