ECZ 2016 · O-Level Paper 1 — Trigonometry
In triangle PQR, PQ = 12 cm, QR = 10 cm and ∠PQR = 150°. Calculate the area of triangle PQR.
- A. 30 cm²
- B. 60 cm²
- C. 120 cm²
- D. 52 cm²
Verified working — step 1
Area = ½ × PQ × QR × sin(∠PQR) = ½ × 12 × 10 × sin 150° = 60 × 0.5 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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