Class 10 · Mathematics (Basic) · Unit 9: Some Applications of Trigonometry

Angle of Depression

Lesson 2 of 6

When looking down at an object below the horizontal, the angle from the horizontal to the line of sight (downward) is the angle of depression. By alternate angles, the angle of depression from top equals the angle of elevation from below.

Angle of Elevation

Setting Up the Problem

All lessons in this unit

1. Angle of Elevation
2. Angle of Depression
3. Setting Up the Problem
4. Two-Observer or Two-Object Problems
5. Common Angles and Values
6. Sanity Checking Answers