Since this got closed Convert Polar equation to Cartesian coordinates
So I ended up doing some work and I don't know if I'm headed in the right direction, or maybe if I solved it correctly.
problem: $$r\cos(\theta) = 5r^2\sin(2\theta)$$
Assuming that I'm correct with how to handle converting polar to cartesian, this would be just a horizontal line. I'm confused because I have to give cartesian coordinates, and also describe the curve.