CAPE Pure Mathematics Unit 2 · May/June 2017 · Paper 1 · Question Q13

The argument of the complex number z = -\frac{1}{2} + i\frac{\sqrt{3}}{2} is

1. (A)\frac{\pi}{6}
2. (B)\frac{\pi}{4}
3. (C)\frac{\pi}{3}
4. (D)\frac{\pi}{2}