Polygonal Trig Parametric Coordinate Functions
The applet below illustrates parametric coordinate functions for various polygonal trig functions.
Drag points A and B to change the size and orientation of the polygon.
Drag the slider to change the number of sides on the polygon.
This is based on http://solvemymaths.com/2014/12/23/pis-parametric-coordinate-functions/
and http://demonputty.tumblr.com/post/100180566876/spring-of-mathematics-1ucasvb-pis-parametric