0580/13 Oct/Nov 2022, Question 21: Choosing the Right Trigonometric Ratio
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 2 marks
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The question, in short
Use the right-angled triangle with hypotenuse 21.8 cm and a 56° angle to calculate the horizontal side x, opposite the 56° angle.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1sin 56° = x/21.8
- 2x = 21.8 × sin 56° = 18.07… ≈ 18.1
Answer18.1 or 18.07…
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