Fourier series and Discrete Fourier transform

A set of applets showing a geometric representation of the the Discrete Fourier Transform and how to use it to draw closed curves with epicycles. For more info see: Tracing closed curves with epicycles: A fun application of the discrete Fourier transform. https://mathed.miamioh.edu/index.php/ggbj/article/view/197 Trigonometric intepolation using the Discrete Fourier Transform. https://mathed.miamioh.edu/index.php/ggbj/article/view/188