Math
Math, 17.10.2019 23:00, daniya0

From a point 30m above the water of a lake the angle of elevation of an aeroplane is 30°. angle of depression of the reflection of the plane from the lake is 60°. find the height of the plane from the ground.

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From a point 30m above the water of a lake the angle of elevation of an aeroplane is 30°. angle of d...

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