4MA1/2H Jan 2022, Question 14: The Tangent Ratio
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 3 marks
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The question, in short
Using the zip wire diagram with CD = 2.6 m and BD = 12 m, find the minimum height of post AB so that angle x is at least 5°, to 3 significant figures.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1AB is higher than CD by 12 × tan 5° = 1.0498… m
- 2AB = 2.6 + 1.0498… = 3.6498…
- 3Correct to 3 significant figures: 3.65
Answer3.65
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