Based on Polar Grapher with drop downlist.

[list][br][*]This applet graphs the polar function r = f(θ). [br][*]If you plane to modify this file use x instead of θ (it's what GG needs!) [br][*]The following functions are allowed: abs( ), sqrt( ), cbrt( ), exp( ), ln( ), log( ), cos( ), sin( ), tan( ), cosh( ), sinh( ), tanh( ) [br][*]Ctrl + [click and drag] on the background to move the coordinate axes around. [br][*]Ctrl + [scroll wheel] to zoom in and out.[br][/list]