a. On the same grid, sketch the graphs of y = |1 + 4 cos x| and

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a. On the same grid, sketch the graphs of y = |1 + 4 cos x| and y = 2 + cos x for 0° ≤ x ≤ 360°.

b. State the number of roots of the equation |1 + 4 cos x| = 2 + cos x for 0° ≤ x ≤ 360°.

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Cambridge IGCSE And O Level Additional Mathematics Coursebook

ISBN: 9781108411660

2nd Edition

Authors: Sue Pemberton

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Question Posted: Aug 27, 2021 12:55 AM

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a. On the same grid, sketch the graphs of y = |1 + 4 cos x| and

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Cambridge IGCSE And O Level Additional Mathematics Coursebook

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