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Official 2020 Paper 2 · Q2

Paper 2Trigonometry

Given that tan⁡θ=2\tan\theta=2 and 180∘<θ<360∘180^\circ<\theta<360^\circ, find the value of cos⁡θ\cos\theta.

A3\sqrt3
B−3-\sqrt3
C32\frac{\sqrt3}2
D−32-\frac{\sqrt3}2
E55\frac{\sqrt5}5
F−55-\frac{\sqrt5}5
G255\frac{2\sqrt5}5
H−255-\frac{2\sqrt5}5

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