4024/12 Oct/Nov 2022, Question 24: Choosing the Right Trigonometric Ratio
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 1 mark
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The question, in short
Given sin x° = sin 50° with x between 90 and 180, find x.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 1 mark
- 1sin x° = sin(180 − x)°
- 2x = 180 − 50 = 130
Answer130
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