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Fourier series
Egilea:
Daniel Mentrard
Gaia:
Funtzioak
http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/FourierserMD.html A Fourier series is an expansion of a periodic function f(x) in terms of an infinite sum of sines and cosines.
http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/FourierserMD.html
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