File:Sine Waves and Degrees of Phase

Description
We have all seen pure tones illustrated as sine waves. But each moment in the sine wave's formation has a different 'phase' associated with it (from 0 degrees to 359 degrees.) You can see the sine wave forming here, and the round 'protractor' on the left shows you the equivalent phase at particular moments in time. By drawing the various points on the graph on the right associated with the rotation on the protractor, you can create a drawing of a sine wave. This is a screen capture from http://www.ies.co.jp/math/java/samples/graphSinX.html. You can go to that link and try it for yourself! Lots of Java math applets here: http://www.ies.co.jp/math/java/index.html