2023 SCSS P1 Q3

2023 SCSS P1 Q3

Secondary 4
5 marks
  1. Write down the period and amplitude of \(y=4\cos\left(\dfrac x2\right)-1\).[2]
  2. Sketch, on the axes below, the graph of \(y=4\cos\left(\dfrac x2\right)-1\) for \(0\le x\le2\pi\) radians.[3]

Solution:

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Answer:(i) Period \(4\pi\), amplitude 4. (ii) Sketch shown.

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