﹙3，√3﹚ρ=√(9+3)=2√3θ=arcsin(√3/(2√3))=π/6﹙0﹣，√5／3﹚ρ=√5/3θ=π/2﹙7／2,0﹚ρ=7/2θ=0﹙﹣2，﹣2√3﹚ρ=√(4+12)=4θ=arcsin(-2√3/4)=arcsin(-√3/2)=π+π/3
