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WAEC Mathematics 2003 Question 20

Question 20

Trigonometry

A ladder, 6m long, leans against a vertical wall at an angle 53° to the horizontal. How high up the wall does the ladder reach?

  1. A.3.611m
  2. B.4.521m
  3. C.4.792m
  4. D.7.962m.
Show the answer and explanation

Answer: C (4.792m)

Explanation

Height = 6 sin 53° = 6 × 0.7986 ≈ 4.792 m.