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Solve $3\cos 2\theta = 3\cos \theta + 2$, for $0^\circ \leq \theta \leq 360^\circ$.
Mathematics 9709 · AS & A Level · Trigonometry
Trigonometry — practice question
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply the correct double-angle formula to form an equation in $\cos\theta$” …
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