en.wikipedia.org/wiki/Fourier_series

In mathematics, a **Fourier series** is a way to represent a function as the sum of
simple sine waves. More formally, it decomposes any periodic function or
periodic ...

mathworld.wolfram.com/FourierSeries.html

**Fourier series** make use of the orthogonality relationships of the sine and cosine
functions. The computation and study of **Fourier series** is known as harmonic ...

www.khanacademy.org/science/electrical-engineering/ee-signals/ee-fourier-series/v/ee-fourier-series-intro

The **Fourier Series** allows us to model any arbitrary periodic signal with a
combination of sines and cosines. In this video sequence Sal works out the
Fourier ...

tutorial.math.lamar.edu/Classes/DE/FourierSeries.aspx

Okay, in the previous two sections we've looked at Fourier sine and Fourier
cosine series. It is now time to look at a **Fourier series**. With a **Fourier series** we
are ...

www.sosmath.com/fourier/fourier1/fourier1.html

is called a **Fourier series**. Since this expression deals with convergence, we start
by defining a similar expression when the sum is finite. Definition. A Fourier ...

brilliant.org/wiki/fourier-series

A **Fourier series** is a way of representing a periodic function as a (possibly infinite
) sum of sine and cosine functions. It is analogous to a Taylor series, which ...

www.stewartcalculus.com/data/CALCULUS%20Early%20Transcendentals/upfiles/FourierSeries5ET.pdf

The series in Equation 1 is called a trigonometric series or **Fourier series** and it
turns out that expressing a function as a **Fourier series** is sometimes more ...

www.thefouriertransform.com/series/coefficients.php

The **Fourier Series** is a weighted sum of sinusoids. The weights or coefficients
are given on this page.