Use the expansions of cos(5x + x) and cos(5x x) to prove that cos 6x +
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Use the expansions of cos(5x + x) and cos(5x − x) to prove that cos 6x + cos 4x Ξ 2 cos5x cos x.
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Related Book For
Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook
ISBN: 9781108407199
1st Edition
Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey
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