a. Express 4 cos 3 sin (90 3) as a single trigonometric function. b. Hence

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a. Express 4 cos 3θ − sin (90° − 3θ) as a single trigonometric function.

b. Hence solve 4 cos 3θ − sin (90° − 3θ) = 2 in the interval 0 ≤ θ ≤ 360°. Give your answers to 3 significant figures.

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