Figure 6.15.1. r=1+sinθ r = 1 + sin θ and r=cos3θ r = cos 3 θ (a) r= 2, r = 2, (b) r= 2cosθ, r = 2 cos θ, (c) r= sinθ. r = sin θ. On the given cardioid, x = (1+cosθ)cosθ x = (1 + cos θ) cos θ and y = ...