4MA1/2FR Jan 2019, Question 22: Choosing the Right Trigonometric Ratio
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 4 marks
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The question, in short
Using the right-angled trapezium with top side 37 cm, left side 15 cm and a 125° angle at the top right, work out y, giving the answer to 1 decimal place.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 4 marks
- 1125 − 90 = 35
- 2tan(35) = x / 15
- 3x = 15 × tan(35)
- 4x = 10.5
- 5y = 10.5 + 37
- 6y = 47.5
Answer47.5
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