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From an aeroplane vertically above a straight horizontal road, the angles of depression of two stones on opposite sides of the aeroplane are observed to be α and β. The distance between the stones is 1m.Then the height in meters of the aeroplane above the road is |
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Answer» From an aeroplane vertically above a straight horizontal road, the angles of depression of two stones on opposite sides of the aeroplane are observed to be α and β. The distance between the stones is 1m.Then the height in meters of the aeroplane above the road is |
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