Question: Find the third-order Fourier approximation to the square wave function f(t) = 1 for 0 t < and f(t) = 1 for

Find the third-order Fourier approximation to the square wave function f(t) = 1 for 0 ≤ t < π and f(t) = –1 for π ≤ t < 2π.

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