__Parametric
Equations__

Use the following applet to investigate properties of the curve
defined by the equations *x* =
*r*_{1}cos(*a*ø) and *y* =
*r*_{2}sin(*b*ø).

Pay particular attention to the way a circle and elipse is defined
using parametric equations.

**Figure **`parametric.fig`
**Investigate how to draw these curvees on the graphic display
calculator.**

**Applet created on 1/30/01 by Jamie
Coventry with ****CabriJava**