A collection of seven miscellaneous programs: Grid,
Polar Grid (draws rectangular and polar grids resp., then these
grids can be projected onto a screen), Trig 1, Trig 2, Trig 3
(graphically demonstrates the definitions of the trig functions),
x^n sin(1/x) (animated display of tangent lines to these curves),
and Polygons (draws regular polygons in a circle and calculates
area and perimeter).