a. Prove that cos 4 2 sin 4 2 cos 4. b. Hence find, for 0


a. Prove that cos4 2θ − sin2θ ≡ cos 4θ.

b. Hence find, for 0 ≤ θ ≤ 180°, all the solutions of cos4 2θ − sin4 2θ = 1/2.

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Related Book For  answer-question

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

Question Details
Chapter # 7
Section: Mixed exercise
Problem: 23
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Question Posted: August 12, 2023 05:25:44