Cartesian equation:

$\frac{{x}^{2}}{{a}^{2}}+\frac{{y}^{2}}{{b}^{2}}=1$

or parametric equation:

$\{\begin{array}{c}x=acost\\ y=bsint\end{array}$

$\frac{{x}^{2}}{{a}^{2}}+\frac{{y}^{2}}{{b}^{2}}=1$

or parametric equation:

$\{\begin{array}{c}x=acost\\ y=bsint\end{array}$

This page demonstrates the `canvas`

element added by HTML 5 by plotting a few mathematical curves.
If the curves don’t show up, your Web browser most likely cannott handle HTML 5.
We recommend the use of browsers such as Firefox® or Opera.
If the equations aren’t displayed properly, you may switch to a page without MathML.

The cursors allow you to change the parameters of the equations. Your comments are welcome. Please send your message to contact /@/ ascolteo /./ fr.

The equations were taken from the special issue #8 of the Revue du Palais de la Découverte (“Courbes mathématiques” – prepared by Jean Brette – July 1976 – ISBN: 2‑85607‑003‑5 – ISSN: 0180-3344).

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