Given that cos x + sin x = m and cos x sin x = n,
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Given that cos x + sin x = m and cos x − sin x = n, where m and n are constants, write down, in terms of m and n, the value of cos 2x.
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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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