a Using cos 2A 2 cos 2 A 1 1 2 sin 2 A, show that b Given that cos 0 6, and that is acute, write down the values of c Show that i cos 1 cos x 2 ii sin sin 1 cos x 2...

ai cos x 2 cos bi C ii cos x 1 2 sin 2 2 cos 1 cos ...

a. Using cos 2A 2 cos 2 A 1 1 2 sin 2

Question:

a. Using cos 2A ≡ 2 cos² A − 1 ≡ 1 − 2 sin² A, show that:

b. Given that cos θ = 0.6, and that θ is acute, write down the values of:

c. Show that

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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 11, 2023 07:12 AM

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a. Using cos 2A 2 cos 2 A 1 1 2 sin 2

Question:

i cos² ||| = 1 + cos x 2 ii sin². sin²- ||| 1 - cos x 2

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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