Joshua T. answered 10/08/25
Highly Experienced Math Tutor — Fresh, Effective, Student-Focused
An angle of elevation is the angle formed by a horizontal line and the line of sight when looking upward at an object. On the other hand, an angle of depression is the angle formed by a horizontal line and the line of sight when looking downward at an object.
For example, suppose a person wants to find the height of a building. They stand 100 feet away from its base and measure the angle of elevation to the top of the building as 35°. By using the tangent function, they can calculate the building’s height.
tan(35°) = height / 100 ft
height = 100 ft * tan(35°)
height = 100 ft * 0.7
height = 70 ft
This type of application is common in surveying, navigation, aviation, and construction, where direct measurement of distances or heights is difficult or impossible. Hope this helps!