implicit polar plots

[kcrisman]

See this sage-support thread, where it is requested to be able to plot things such as r²=5-4cos(theta) using the usual implicit plot syntax and nothing more.

Component: graphics

Issue created by migration from https://trac.sagemath.org/ticket/30817

[egourgoulhon]

Description changed:

--- 
+++ 
@@ -1 +1 @@
-See [this sage-support thread](https://groups.google.com/forum/#!topic/sage-support/yGWPfxfOR9Y), where it is requested to be able to plot things such as  r^2=5-4cos(theta) using the usual implicit plot syntax and nothing more.
+See [this sage-support thread](https://groups.google.com/forum/#!topic/sage-support/yGWPfxfOR9Y), where it is requested to be able to plot things such as  r<sup>2</sup>=5-4cos(theta) using the usual implicit plot syntax and nothing more.

[mkoeppe]

comment:2

Setting new milestone based on a cursory review of ticket status, priority, and last modification date.