0580/11 May/Jun 2022, Question 15: The Sine Ratio
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 2 marks
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The question, in short
Right-angled triangle ABC has right angle at B, hypotenuse AC = 15 cm and angle BAC = 38°. Calculate the length of side BC.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1sin 38° = BC/15
- 2BC = 15 × sin 38°
- 3= 9.234… ≈ 9.23 cm
Answer9.23 or 9.234 to 9.235
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