i. Using the expansion of cos(3x x) and cos(3x + x), prove that ii. Hence show

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i. Using the expansion of cos(3x − x) and cos(3x + x), prove that

ii. Hence show that

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Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook

ISBN: 9781108407199

1st Edition

Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey

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Question Posted: Mar 18, 2023 07:06 AM

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i. Using the expansion of cos(3x x) and cos(3x + x), prove that ii. Hence show

Question:

-~ (cos 2x - cos 4x) = sin 3x sin.x.

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We can start by expanding cos3x x and cos3x x using the angle addition formula for cosine cos3x x co...View the full answer

Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook

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