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

Setting Up the Problem

Lesson 3 of 6

Sketch a right triangle: vertical leg is the object's height, horizontal leg is the distance from the observer, hypotenuse is the line of sight. Use the appropriate ratio (

\tan, \sin,

\cos

) based on which sides you know or want.

Angle of Depression

Two-Observer or Two-Object Problems

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