Trigonometryhard · Past Paper
A tower subtends an angle α at a point A and elevation of top of a flagstaff on it is β. If h is flagstaff height, tower height is:
Ah tanα / (tanβ - tanα)
Bh tanβ / (tanβ - tanα)
Ch sinα / sinβ
Dh cosα
✓ Correct Answer: A — h tanα / (tanβ - tanα)
Same as surmounting flagstaff problem. Tower height = h tan α / (tan β - tan α).
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