Original author: [url=https://www.geogebra.org/u/institute-mei]GeoGebra Institute of MEI[/url][br][br]Here is an interactive worksheet that will allow you to plot polar functions of the form [math](r, \theta)[/math].[br][br]Try entering different functions into the input box in the top left hand corner. Suggested functions to try might be:[br][math]r=2\cos\left(\theta\right)[/math][br][math]r=\cos\left(2\theta\right)[/math][br][math]r=\sin\left(11\theta\right)[/math][br][math]r=\sqrt{\sin\left(2\theta\right)}[/math][br][math]r=2+\cos\left(10\theta\right)[/math][br][br]To get the [math]\theta[/math] symbol in your formula, you can reload the page to show the default function, [math]1-\cos\left(\frac{\theta}{2}\right)[/math], and highlight then copy the theta symbol. You can then paste that into any new formulas you want to use.