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O-LevelMathematicsTrigonometry4024/11 · Oct/Nov 2010 · Q214 Marks

In the diagram, ABC is a straight line. BD = 4 cm, ∠BCD = 90° and ∠CBD = b°. Use as much information given in the table as is necessary to answer the following questions. (Table: sin b° | cos b° | tan b° 0.85 | 0.53 | 1.6)

  1. (a)Calculate the value of sin ∠ABD + cos ∠ABD.[2]
  2. (b)Calculate BC.[2]

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About this question

Topic
Trigonometry, O-Level Mathematics (syllabus 4024). Structured question, 4 marks.
Source
O-Level Mathematics, Oct/Nov 2010 Paper 1 Variant 1, question 21.

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