CAPE Pure Mathematics Unit 1 · May/June 2009 · Paper 1 · Question Q19

If P = (2\sin^2\theta + 2\cos^2\theta)(\sec^2\theta - \tan^2\theta) then P is equal to

1. (A)2
2. (B)4
3. (C)2(\tan^2\theta - \cot^2\theta)
4. (D)4(\sec^2\theta + \tan^2\theta)