I have been thinking about since morning, but didn't seen to find a way to even start to solve this:

Get the cartesian equation for the curve r=2*cos a , and make the graph of this curve

Can anyone help me? Thank you! (:

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- Jul 9th 2011, 04:31 PMweberConverting a polar equation to Cartesian form.
I have been thinking about since morning, but didn't seen to find a way to even start to solve this:

Get the cartesian equation for the curve r=2*cos a , and make the graph of this curve

Can anyone help me? Thank you! (: - Jul 9th 2011, 05:44 PMskeeterRe: Circumference
assuming you mean ...

(instead of "a")

note that is one of your basic conversion equations.

rearranging ...

substitute for in your original equation ...

also note that ...

... and this would be the equation of what conic section?

**Moderator edit:**Excellent reply restored. Post #3 deleted.