CSEC Additional Mathematics · 2018 · Paper 1 · Question Q27

The trigonometrical expression \frac{\sin x}{1 - \cos x} + \frac{\sin x}{1 + \cos x} is identical to

1. (A)2\sin x
2. (B)2\tan x
3. (C)\tan^2 x
4. (D)\frac{2}{\sin x}