Fourier series
A Fourier series () is a series expansion of a periodic function into a sum of trigonometric functions. The Fourier series is an example of a trigonometric series.
A Fourier series () is a series expansion of a periodic function into a sum of trigonometric functions. The Fourier series is an example of a trigonometric series.
A Fourier series () is a series expansion of a periodic function into a sum of trigonometric functions. The Fourier series is an example of a trigonometric series.
Source: Wikipedia "Fourier series" · CC BY-SA 4.0
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