You have only to enter two functions f (t) and g(t) defining the parametric curve, with ranges of variation for t, x, y. You will receive as reply an animated sequence showing the curve with a moving point corresponding to the variation of the parameter t. This variation of t is shown by a bar at the bottom of the figure, synchronized with the point on the curve.
Some examples of parametric curves are at your disposal.
The most recent version
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Description: plots a parametric curve with moving point. interactive exercises, online calculators and plotters, mathematical recreation and games
Keywords: interactive mathematics, interactive math, server side interactivity, geometry, plot, plotter, graphing, curve, parametric curve, animation