This resource from Johns Hopkins University has audio and interactive components. Various forms of the Fourier series description for periodic signals are based on alternate ways of writing a cosine signal. This resource...

For the phasor phanatic, created Hsi Chen Lee of Johns Hopkins University, an applet that offers 4 ways to generate and observe continuous-time harmonic phasor sums and the corresponding fourier series.

When the Scout Report last visited the Probability Tutorials in 1999, there were just twelve tutorials on this site. Since that time, the tutorials offered here have grown both in number (from twelve to twenty) and in...

This interactive phasor page allows you to control the values of a rotating phasor and see a visualization of each change that is done. You can control: one, pos/neg, two, beats, delta, sawtooth, square, triangle, time,...