Using the expansion of cos (A B) with A = B = , show that sin
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Using the expansion of cos (A − B) with A = B = θ, show that sin2 θ + cos2 θ ≡ 1.
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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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