Question

$\large\mathbf{HEY\: QUESTION❤}$




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



★ SOLVE BOTH QUESTION PLIZ​

Answer 1

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Answer 2

Answer:

Your answer in the attachment ☝