ECZ 2017 · O-Level Paper 1 — Trigonometry
Triangle PQR is right-angled at R, with QR = 4 cm and tan(angle QPR) = 43. Find sin(angle PQR).
- A. 45
- B. 35
- C. 43
- D. 34
Verified working — step 1
From tan P = 43with QR = 4, the adjacent side PR = 3, so the hypotenuse PQ = √(3² + 4²) = 5. At Q the opposite side is PR = 3, so sin(angle PQR) = …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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