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Solve $\sin(2\theta + 30^\circ) = 5\cos(2\theta + 60^\circ)$ for $0^\circ < \theta < 180^\circ$.
Mathematics 9709 · AS & A Level · Trigonometry
Trigonometry — practice question
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Expand correctly at least one of $\sin(2\theta + 30)$ and $\cos(2\theta + 60)$” …
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