Hi, I want to calculate the Fourier series expansion of f(x)= a sin(x) / (1-2 a cos(x) + a^2), where |a|<1 and -pi < x <pi, but I cannot integrate the function "cos(nx) f(x)". Is there a trick for this integration. Thanks.
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Originally Posted by Gaudium Hi, I want to calculate the Fourier series expansion of f(x)= a sin(x) / (1-2 a cos(x) + a^2), where |a|<1 and -pi < x <pi, but I cannot integrate the function "cos(nx) f(x)". Is there a trick for this integration. Thanks. Observe that: then integration by parts will help CB
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