1. What is the difference between Angle of Elevation and Angle of Depression?

The angle of elevation and the angle of depression are two angles that are commonly used in trigonometry and geometry. The main difference between the two angles is the direction in which they are measured.<br /><br />The angle of elevation is the angle formed by the line of sight of an observer and the horizontal line when the observer is looking at an object that is above the horizontal line. In other words, it is the angle between the horizontal line and the line of sight of an observer looking at an object that is above the horizontal line.<br /><br />On the other hand, the angle of depression is the angle formed by the line of sight of an observer and the horizontal line when the observer is looking at an object that is below the horizontal line. It is the angle between the horizontal line and the line of sight of an observer looking at an object that is below the horizontal line.<br /><br />In summary, the angle of elevation is used when the object is above the horizontal line, while the angle of depression is used when the object is below the horizontal line.