# Astroid

**Astroid** is a particular type of curve: a hypocycloid with four cusps.

A circle of radius 1/4 rolls around inside a circle of radius 1 and a point on its circumference traces an astroid. A line segment of length 1 slides with one end on the x-axis and the other on the y-axis, so that it is tangent to the astroid. The parametric equations are:

x = (cos(p))^3

y = (sin(p))^3

To plot function **Astroid** use the folowing script:

# Example |