CSEC Additional Mathematics · 2014 · Paper 1 · Question Q36

The gradient at x = \frac{\pi}{6} on the curve y = \cos x is

1. (A)-\frac{\sqrt{3}}{2}
2. (B)-\frac{1}{2}
3. (C)\frac{1}{2}
4. (D)\frac{\sqrt{3}}{2}