Trigonometryhard · Past Paper
A flagstaff on a tower 20 m high subtends 45° at a point 20 m from the foot. Flagstaff height?
AInfinite
B20 m
C40 m
DUndefined
✓ Correct Answer: A — Infinite
Distance 20m, tower 20m => angle to tower top is 45°. If flagstaff subtends another 45°, total angle is 90°, which is impossible (line of sight vertical).
Share this question