At a point A, 20 metres above the level of water in a late, the angle of elevation of a cloud is 30°. The angle of depression of the reflection of the cloud in the lake, at A is 60°. Find the distance of the cloud from A.
Негізгі бет At a point A, 20 metres above the level of water in a lake, the angle of elevation of a cloud is 30°
Пікірлер: 21