Solve Polar to Cartesian Equation & Identify Graph

[RESmonkey]

Homework Statement

Replace the polar equation by an equivalent Cartesian (rectangular) equation. Then identify or describe the graph.

****Let's just make x = theta because I can't find a theta symbol*****

r = 2cos(x) + 2sin(x)

Homework Equations

none?

The Attempt at a Solution

x = rcos(x) = (2cos(x) + 2sin(x)) * cos(x)
y = rsin(x) = (2cos(x) + 2sin(x)) *sin(x)

No idea what do to from here.


Thanks in advance

 

[benorin]

Try multiplying $r = 2\cos\theta + 2\sin\theta$ through by $r$.