Express cos 2 2x in terms of cos 4x.

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Express cos² 2x in terms of cos 4x.

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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 14, 2023 07:17 AM

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Express cos 2 2x in terms of cos 4x.

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Using the double angle formula for cosine we have cos 2x 2 cos2 x 1 Squaring both s...View the full answer

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

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