ECZ 2020 · GCE Paper 1 — Trigonometry
The diagram below shows a right angled triangle PQR. Given that PQ = 15 cm and cos x° = 23, calculate the length of QR.
- A. 22.5 cm
- B. 10 cm
- C. 7.5 cm
- D. 5 cm
Verified working — step 1
cos x° = adjacenthypotenuseThe 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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