emilymariec5201 emilymariec5201

22-05-2023
Mathematics

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(ii) Prove the identity (2 – 2 cos 0) (sin + sin 20 + sin 30) = -(cos 40 - 1) sin + sin 40 (cos - 1). (iii)Find the roots of f(x) = x3 – 15x – 4 using the trigonometric formula. =

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