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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