(iii) (2,π6)(2,\dfrac{\pi}{6})(2,6π) Here r=2>0r=2>0r=2>0 and θ=π6\theta=\dfrac{\pi}{6}θ=6π. x=2cosπ6=3y=2sinπ6=1\begin{aligned} x&=2\cos\frac{\pi}{6}=\sqrt{3}\\ y&=2\sin\frac{\pi}{6}=1 \end{aligned}xy=2cos6π=3=2sin6π=1