a. Given that sin 2 + cos 2 = 1, show that 2 sin (cos
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a. Given that sin 2θ + cos 2θ = 1, show that 2 sin θ (cos θ − sin θ) = 0.
b. Hence, or otherwise, solve the equation sin 2θ + cos 2θ = 1 for 0 ≤ θ < 360°.
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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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