solving perpendicular oscillation problems-- lissajous Hi all. Ok, I am not getting how we're to solve perpendicular oscillatory systems. How do the variances in frequency, and phase play into the drawing/solving of these systems? Oh, and this is not a trig class I'm doing. It's an oscillation/wave class. Do we solve for the individual trig functions, at various points in time, and mark our points within the rectangle, and then draw our lissajous graph? Some serious clarification would be appreciated. For what it's worth, I'm using the MIT Intro. Physics Series, A.P. French-- Vibrations and Waves text. Thanks.