File:XCubed Fourier Series.png

Summary
Graph of x3, periodic on (-π,π), with the Fourier Series Approximations drawn in at k=7 (red) and k=15 (blue)

Source: Wikimedia Commons ,

Date: 22 February 2008

Author and copyright holder: "Inductiveload"

License: I, the copyright holder of this work, release this work into the public domain. This applies worldwide.