6. Parametric Curves
• In mathematics, a parametric equation of
a curve is a representation of this curve
through equations expressing
the coordinates of the points of the curve as
functions of a variable called a parameter.
• a curve is, generally speaking, an object
similar to a line but which is not required to
be straight
7. Parametric Function
Parametric equations are convenient
for describing curves in higherdimensional spaces. For example:
X = a cos(t)
Y = a sin(t)
Z = bt
describes a three-dimensional curve,
the helix, which has a radius of a and
rises by 2πb units per turns