Tham KY's answer to LockB's Secondary 3 A Maths Singapore question.
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Date Posted:
3 years ago
You need to make an assumption that the tower has no width at all.
Because in reality, the angle of depression is measured from the point of the observing (which is often at the closer end of the building) to the ground, and the points of observation for P and W will be different in a real case scenario.
If the circular tower is say 10 m in diameter, the values will be quite different.
Without this assumption, the actual distances PF and FW will be more than they actually are.
Because in reality, the angle of depression is measured from the point of the observing (which is often at the closer end of the building) to the ground, and the points of observation for P and W will be different in a real case scenario.
If the circular tower is say 10 m in diameter, the values will be quite different.
Without this assumption, the actual distances PF and FW will be more than they actually are.
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