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tmua.me Medium Set D Paper 2 · Q3

Paper 2TrigonometryGeometry

The angle θ\theta satisfies

cos⁡θ=−3sin⁡θ,0∘<θ<180∘.\cos\theta=-\sqrt3\sin\theta, \qquad 0^\circ<\theta<180^\circ.

What is the value of θ\theta?

A30∘30^\circ
B60∘60^\circ
C120∘120^\circ
D150∘150^\circ
E330∘330^\circ

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