a. Sketch the graph of y = 2 + 5 cos x for 0 x
Question:
a. Sketch the graph of y = 2 + 5 cos x for 0° ≤ x ≤ 180°.
b. Sketch the graph of y = |2 + 5 cos x| for 0° ≤ x ≤ 180°.
c. Write down the number of solutions of the equation |2 + 5 cos x| = 1 for 0° ≤ x ≤ 180°.
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Cambridge IGCSE And O Level Additional Mathematics Coursebook
ISBN: 9781108411660
2nd Edition
Authors: Sue Pemberton
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