NEW 10/23/2017 - ZeGrapher 3.0.2 Software is an open source, ergonomic and fast math graphing software. It can plot functions, sequences, parametric equations and data on the plane.

Parametric equation: the parametric equation of a curve is its representation through equations which express the coordinates of the points of the curve as functions of a variable, called a parameter; ex: y = cost or y = sint