How do you convert y=(x-y)^2+xy into a polar equation?

1 Answer
Dec 27, 2016

r=sintheta/(1-sinthetacostheta)

Explanation:

The relation between Cartesian coordinates (x,y) and polar coordinates (r,theta) is given by

x=rcostheta, y=rsintheta and r^2=x^2+y^2

Hence, y=(x-y)^2+xy

hArrrsintheta=(rcostheta-rsintheta)^2+rcosthetaxxrsintheta

or sintheta/r=cos^2theta+sin^2theta-2sinthetacostheta+sinthetacostheta

or r=1-sinthetacostheta

or r=sintheta/(1-sinthetacostheta)
graph{y=(x-y)^2+xy [-2.344, 2.656, -0.43, 2.07]}