2026 IGCSE Additional Mathematics May/June 0606/12 Q1

2026 IGCSE Additional Mathematics May/June 0606/12 Q1

5 marks
  1. On the axes, sketch the graph of \(y=4\cos x-2\) for \(-360^\circ\le x\le360^\circ\).[2]
  2. Write down the amplitude of \(4\cos x-2\).[1]
  3. Write down the period of \(4\cos x-2\).[1]
  4. Write down the set of values of the constant \(k\) for which the equation \(4\cos x-2=k\) has at least two solutions.[1]

Solution:

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Answer:(a) Graph shown. (b) \(4\) (c) \(360^\circ\) (d) \(-6\le k\le2\)

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