Trigonometryhard · Past Paper
From top of tower h, elevation of a balloon is α and depression of its reflection is β. Height of balloon?
Ah sin(β+α) / sin(β-α)
Bh tan(β+α) / tan(β-α)
Ch cos(β+α)
Dh
✓ Correct Answer: A — h sin(β+α) / sin(β-α)
Using sine rule or tan identities, H = h sin(β+α) / sin(β-α) is the general solution for this classic problem.
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