1. The problem statement, all variables and given/known data I need to get y = mx in polar form. I looked at it logically, and I figured I needed a function f(x) that will resolve 0 when x =/= 0, and will resolve 1 when x = 0. I thought for a while, and then realized that sine sorta does that, and just needs a tweak to do it exactly: [tex] r = cos^\infty(\theta - c) [/tex] But this function, although great, is cumbersome. I can't find any other formulas, and my attempts to derive one only equal in cancellations on both sides. 2. Relevant equations x = rcos(theta) y = rsin(theta) m = tan(theta) Anything else you can think of. Just to make it clear, I would like it in r form, I know of the [tex]\theta = \varphi[/tex] equation.