Trigonometryhard · Past Paper
Angle of elevation of top of a tower from point A is 30°. From point B, 20 m closer, it is 60°. Find tower height.
A10√3 m
B20√3 m
C15 m
D10 m
✓ Correct Answer: A — 10√3 m
h/tan 60 = x, h/tan 30 = x + 20. h/√3 + 20 = h√3 => 20 = 2h/√3 => h = 10√3.
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