CSEC Additional Mathematics · 2014 · Paper 1 · Question Q30

The smallest positive angle for 0 \le \theta \le 2\pi, for which the equation (2\cos\theta - 1)(\cos\theta - 2) = 0 is positive is

1. (A)\frac{\pi}{3}
2. (B)\frac{2\pi}{3}
3. (C)\frac{4\pi}{3}
4. (D)\frac{5\pi}{3}