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JAMB Mathematics 1991 Question 43

Question 43

Trigonometry

A surveyor walks 500m up a hill which slopes at an angle of 30°. Calculate the vertical height through which he rises.

  1. A.250m
  2. B.500√3/3 m
  3. C.250√2m
  4. D.250√3m
Show the answer and explanation

Answer: A (250m)

Explanation

Vertical height = 500 sin 30° = 500 × ½ = 250m.