a Prove that cos 4x 4 cos 2x 8 cos 4 x 3 b Hence solve the equation 2cos 4x 8 cos 2x 3 for x ...

a We can use the following trigonometric identities cos 2x 2cos2 x 1 cos 4x 2cos2 2x 1 22cos2 x 12 ...

a. Prove that cos 4x + 4 cos 2x 8 cos 4 x 3. b.

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a. Prove that cos 4x + 4 cos 2x Ξ 8 cos⁴ x − 3.
b. Hence solve the equation 2cos 4x + 8 cos 2x = 3 for − π < x < π.

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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 07:16 AM

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a. Prove that cos 4x + 4 cos 2x 8 cos 4 x 3. b.

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a We can use the following trigonometric identities cos 2x 2cos2 x 1 cos 4x 2cos2 2x 1 22cos2 x 12 ...View the full answer

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

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