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O-LevelAdditional MathematicsTrigonometry4037/11 · May/June 2020 · Q24 Marks

Write down the period of 2 cos x/3 - 1.

  1. (a)Write down the period of 2 cos x/3 - 1.[1]
  2. (b)On the axes below, sketch the graph of y = 2cos x/3 - 1 for -360° ≤ x ≤ 360°. [Figure X.X][3]

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Mark scheme

Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.

  1. [B1] 1080°
  2. [B1] For correct shape and symmetry about the y-axis
  3. [B1] For correct x-intercepts
  4. [B1] For correct y-intercept

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About this question

Topic
Trigonometry, O-Level Additional Mathematics (syllabus 4037). Structured question, 4 marks.
Source
O-Level Additional Mathematics, May/June 2020 Paper 1 Variant 1, question 2.

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