The fourier series can also be written as:(adsbygoogle = window.adsbygoogle || []).push({});

f(x) = Ʃcr*exp(r*2π*i*x/L) where sum if from -∞ to ∞

My book says this at least, but I can't really determine the realitionship between the coefficients of an ordinary fourier and the complex one. How do you get rid of the i that would appear in front of every sin factor, and how do you overall translate the coefficients cr to ar and br of an ordinary fourier series?

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# Complex fourier series

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