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Compute 2π periodic the Fourier series or coefficients, sine-cosine form

Posted 1 year ago
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Hello everyone,

I am seeking a way to compute the sine-cosine form Fourier series of a 2π periodic function on [-π,π], using WolframAlfa. I found a similar topic :

But no concrete response has been posted yet I thought about computing the an and bn coefficients. After some researches I though the response could be the combination of :

FourierCosCoefficient and FourierSinCoefficient. But it does not seems to allow to change interval function. Looking deeply I found :


but it does not seem to be able on WolframAlfa web compute tool.

Could someone explain to me the point I am missing for theses two options ? Thanks by advance

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