1. The problem statement, all variables and given/known data r=(1/(2+cos(θ)) 2. Relevant equations r=sqrt(x^2+y^2) rcosθ=x rsinθ=y 3. The attempt at a solution Not sure what first step to take. This problem looks so simple, but I can't seem to get far on paper. Not sure if I should multiply both sides by 2+cos and then multiply both sides by r, or if I should change the fraction as (2+cos)^-1.