Each graph
displayed is an ellipse and is is described by the parametric
equations:
x = acos t, y = bsin t
Summary
The ellipse has two diameters that are axes of symmetry. The
longer one is called the major axis and the shorter one is called the
minor axis. Note that if you equalize the axes when a and b are the
same, a circle is displayed.
Based on
free Java applets from