Asked by junmark777
Two stations A and B are 2,000m apart. When an airplane was directly above A, an observer at B found that the angle of elevation of the airplane is 60° . How far is the plane from the station B??
Answers
Answered by
Steve
as usual, draw a diagram. You can easily see that if the distance is x,
2000/x = cos 60°
2000/x = cos 60°
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