a. Prove that cos 4 2 sin 4 2 cos 4. b. Hence find, for
Question:
a. Prove that cos4 2θ − sin4 2θ ≡ cos 4θ.
b. Hence find, for 0 ≤ θ ≤ 180°, all the solutions of cos4 2θ − sin4 2θ = 1/2.
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a To prove that cos42 sin42 cos4 well use trigonometric identities and properties Well start by expr...View the full answer
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Related Book For 
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
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