Fourier series - question

In summary, a Fourier series is a mathematical representation of a periodic function as the sum of sine and cosine functions. It is important because it has practical applications in various fields and allows us to analyze complex functions. It differs from a Fourier transform in that it is used for periodic functions and can be calculated through integrals or complex analysis. The applications of Fourier series include signal processing, data analysis, and solving differential equations in fields such as physics, engineering, and mathematics.
  • #1
Tomp
27
0
Homework Statement
f(x) = |sin x|, -pi < x < pi, f(x) = f(x + 2pi)

Determine the Fourier series of f(x)

The attempt at a solution
I am unsure how to evaluate an integral with absolute signs in it, however, I am wondering if I could reduce the bounds to 0<x<pi and and f(x) = sin x and assume an even function extension (cosine extension). When I sketch these I obtain the same graph.

Am I able to do this?
 
Last edited:
Physics news on Phys.org
  • #2
Yes.
 
  • #3
vela said:
Yes.

:) Thank you
 

Related to Fourier series - question

What is a Fourier series?

A Fourier series is a mathematical representation of a periodic function as the sum of sine and cosine functions. It allows us to break down a complex function into simpler components and analyze its behavior.

Why is Fourier series important?

Fourier series is important because it has many practical applications in fields such as signal processing, engineering, physics, and mathematics. It helps us understand and model complex phenomena and solve differential equations.

What is the difference between a Fourier series and a Fourier transform?

A Fourier series is used to represent a periodic function, while a Fourier transform is used to represent a non-periodic function. The Fourier transform is also more general and can be applied to a wider range of functions.

How do you calculate a Fourier series?

The coefficients of a Fourier series can be calculated using integrals or complex analysis techniques. The process involves finding the amplitude and phase of each sine and cosine function that make up the series.

What are the applications of Fourier series?

Fourier series has many applications, including signal processing, image and sound compression, data analysis, and solving differential equations. It is also used in fields such as physics, engineering, and mathematics to model and understand complex phenomena.

Similar threads

  • Calculus and Beyond Homework Help
Replies
3
Views
398
  • Calculus and Beyond Homework Help
Replies
1
Views
1K
  • Calculus and Beyond Homework Help
Replies
1
Views
307
  • Calculus and Beyond Homework Help
Replies
5
Views
502
  • Calculus and Beyond Homework Help
Replies
6
Views
546
  • Calculus and Beyond Homework Help
Replies
2
Views
1K
  • Calculus and Beyond Homework Help
Replies
3
Views
442
  • Calculus and Beyond Homework Help
Replies
6
Views
961
  • Calculus and Beyond Homework Help
Replies
1
Views
597
  • Calculus and Beyond Homework Help
Replies
4
Views
684
Back
Top