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2025 IGCSE Additional Mathematics October/November 0606/11 Q1
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2025 IGCSE Additional Mathematics October/November 0606/11 Q1
5 marks
Write down the amplitude and period of \(3\cos2x-1\).
[2]
Sketch the graph of \(y=3\cos2x-1\) for \(0^\circ\le x\le360^\circ\).
[3]
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Answer:
(a) Amplitude \(3\); period \(180^\circ\). (b) Sketch shown.
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