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Hi everyone,

I'm working with an online graphing program desmos.com. It's great, and actually tons of fun.

I'm currently working with polar coordinates but the only flaw of this grapher is that when working with polar coordinates, it does not include when theta<0

... this is a problem for me because well, it's really only half of the graph!

the equation I have is r=arctan(theta), and I need to graph the entire thing INCLUDING when theta<0. I figured out how to do it using parametrics, but that seems a bit like taking the easy way out. there MUST be a way to express the points where theta<0 without actually using theta<0 in the domain, no? I tried things like r=arctan(arccos(cos(theta))), but of course this only graphs half a rotation. Anyone have any ideas?

Desmos.com

Other equations i'm having the same problem with:

r=|theta|

r=ceiling(theta)

Thanks!

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# Polar Coordinates - Graphing the points of when theta<0

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