a Given that is acute and tan 3 4,prove that 3 sin ( ) 4 cos ( ) 5 cos b Given that sin x 0 6 and cos x 0 8, evaluate cos (x 270) and cos (x 540) ...

a. Given that is acute and tan = 3/4,prove that 3 sin ( + )

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a. Given that α is acute and tan α = 3/4,prove that 3 sin (θ + α) + 4 cos (θ + α) ≡ 5 cos θ

b. Given that sin x = 0.6 and cos x = −0.8, evaluate cos (x 270°) and cos (x + 540°).

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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 05:21 AM

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a. Given that is acute and tan = 3/4,prove that 3 sin ( + )

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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