Question: If = 30, verify the following: (i) cos 3 = 4 cos 3 3 cos (ii) sin 3 = 3 sin

If θ = 30°, verify the following:
(i) cos 3θ = 4 cos3 θ – 3 cos θ
(ii) sin 3θ = 3 sin θ – 4 sin3θ

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