0580/11 Oct/Nov 2022, Question 22: Choosing the Right Trigonometric Ratio
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks
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The question, in short
Using the right-angled triangle with a 17.5 cm side and a 48° angle, calculate the adjacent side x and confirm it rounds to 15.8 to 3 significant figures.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1tan 48° = 17.5/x
- 2x = 17.5 ÷ tan 48°
- 3= 15.757… = 15.8 (3 s.f.)
Answer15.75… or 15.76
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