4MA1/2FR Jun 2020, Question 26: Choosing the Right Trigonometric Ratio
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 5 marks
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The question, in short
Four congruent right-angled triangles sit along straight line ABCDEF; given AJ = 15 cm, angle BAJ = 35° and AF = 80 cm, find EF to 3 significant figures.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 5 marks
- 115 / cos(35°) = AB
- 215 / cos(35°) = 18.3116...
- 318.3116... × 4 = 73.246...
- 480 − 73.246... = 6.753...
- 56.75
Answer6.75
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