Solve the equation cos 2x = cos 144 for 0 x 360.

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Solve the equation cos 2x = cos 144° for 0° ≤ x ≤ 360°.

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Complete Pure Mathematics 1 For Cambridge International AS & A Level

ISBN: 9780198427438

2nd Edition

Authors: Jean Linsky, Brian Western, James Nicholson

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Question Posted: Apr 13, 2023 10:51 AM

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Solve the equation cos 2x = cos 144 for 0 x 360.

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We can use the identity cos180x cosx to rewrite cos144 as follows cos144 cos180 36 cos36 Using the d...View the full answer

Complete Pure Mathematics 1 For Cambridge International AS & A Level

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