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Calculate the exact value of $\sin(\theta + 60^\circ)$.
Mathematics 9709 · AS & A Level · Trigonometry
Trigonometry — practice question
You are told that $\theta$ is an acute angle measured in degrees, and that $\sin \theta = \frac{2}{3}$.
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This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “State, or otherwise indicate, that $\cos\theta = \frac{\sqrt{5}}{3}$” …
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