Give r = 3cos2θ
find the equation that yields the system with solutions at π/6, π/3, 2π/3, 5π/6, 7π/6, 4π/3, 5pi/3, and 11pi/6.
a) r=3cos(θ)
b) r=3sin(θ)
c) r=3sin(2θ)
d) r=3cos(4θ)