WAEC Mathematics 2017 Objective — Question 27
Question 27 of 50 from the West African Examinations Council (WAEC) Mathematics 2017 Objective paper, with the correct answer and a full explanation.
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A stationary boat is observed from a height of 100m. If the horizontal distance between the observer and the boat is 80m, calculate, correct to two decimal places, the angle of depression of the boat from the point of observation.
- A. A. 36.87°
- B. B. 39.70°
- C. C. 51.34°Correct
- D. D. 53.13°
Explanation
tanθ = 100/80 = 1.25. θ = tan^-1(1.25) = 51.34°.
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