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O-LevelAdditional MathematicsTrigonometry4037/12 · Oct/Nov 2010 · Q34 Marks

Show that COS X + COS X = 2 sec x. 1 - sin x 1 + sin x

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2010). The mark or mark type is shown in brackets.

  1. [M1] M1 for attempt to get in terms of a single fraction
  2. [DM1] DM1 simplifying numerator
  3. [M1] M1 simplifying denominator
  4. [A1] A1

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About this question

Topic
Trigonometry, O-Level Additional Mathematics (syllabus 4037). Structured question, 4 marks.
Source
O-Level Additional Mathematics, Oct/Nov 2010 Paper 1 Variant 2, question 3.

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