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WAEC Mathematics 2025 Question 30

Question 30

Trigonometry

In ΔPQR, |QR| = 2 cm, ∠PRQ = 60° and ∠PQR = 90°. Find |PR|

Diagram for this question
  1. A.4√3 cm
  2. B.4 cm
  3. C.2√4 cm
  4. D.4√3/3 cm
Show the answer and explanation

Answer: B (4 cm)

Explanation

PR is the hypotenuse: cos 60° = QR/PR, so PR = 2 ÷ ½ = 4 cm.