a Use the double angle formulae to prove that 1 cosx 1 cos2x tan 2 x b Hence find, for x , all the solutions of 1 cosx 1 cos2x 3, leaving your answers in terms of ...

a. Use the double-angle formulae to prove that 1 - cosx/1 + cos2x tan 2 x.

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a. Use the double-angle formulae to prove that 1 - cosx/1 + cos2x ≡ tan²x.

b. Hence find, for −π ≤ x ≤ π, all the solutions of 1 - cosx/1 + cos2x = 3, leaving your answers in terms of π.

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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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Question Posted: Aug 12, 2023 05:09 AM

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a. Use the double-angle formulae to prove that 1 - cosx/1 + cos2x tan 2 x.

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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