HP49g+ plotting multiple functions

[MathAssassin]

How do I plot multiple functions simultaneously?

I would like to make two plots at once. For example: in polar r = cos theta, r = sin theta. Or in cartesian y = x and y = 2x. For example, to find intersections.

I searched the user's manual, user's guide, and the advanced user's guide to the best of my abilities (I am legally blind and must use a video magnifier). If one can help me and tell me which page in the documentation I can refer to, I would be grateful.