a. By expanding sin (3x + 2x) and sin (3x 2x) using the double-angle formulae, or

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a. By expanding sin (3x + 2x) and sin (3x − 2x) using the double-angle formulae, or otherwise, show that sin 5x + sin x ≡ 2 sin 3x cos 2x.

b. Hence find ∫sin 3x cos 2xdx

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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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a. By expanding sin (3x + 2x) and sin (3x 2x) using the double-angle formulae, or

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a Lets start by expanding sin3x 2x and sin3x 2x using the doubleangle formula for sine DoubleAngle F...View the full answer

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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