What is the equation for graphing a star on a calculator?

To graph a star shape on a calculator, you can use parametric equations. A common representation is:

( x(t) = \sin(5t) \cdot \cos(t) )
( y(t) = \sin(5t) \cdot \sin(t) )

where ( t ) ranges from ( 0 ) to ( 2\pi ). This will produce a five-pointed star when plotted in a graphing calculator set to parametric mode.