a. Given that 4 sin (x + 70) = cos (x + 20), show that tan x

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a. Given that 4 sin (x + 70°) = cos (x + 20°), show that tan x = − 3/5 tan 70°.

b. Hence solve, for 0 ≤ x ≤ 180°, 4 sin (x + 70°) = cos (x + 20°), giving your answers to 1 decimal place.

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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 05:17 AM

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a. Given that 4 sin (x + 70) = cos (x + 20), show that tan x

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a cos x 20 sin 90 20 x sin 70 x Using additi...View the full answer

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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