Learn all Concepts of Chapter 9 Class 10 (with VIDEOS). Check - Heights and Distances - Class 10

In angle of depression, we studied that

1. Angle of depression.jpg

Here, the angle of elevation of the girl to the boy is

2. Angle of depression Angle of elevation.jpg

Now, the two horizontal lines are parallel,

and line of sight is the transversal

Angle of Elevation is equal to Angle of Depression - Teachoo.jpg

AB and CD are parallel lines,

and BC is the transversal

∴ Angle of depression and angle of elevation are alternate angles, and they are equal

∴ Angle of depression = Angle of elevation

Thus, Angle of Depression from point A to point B is same as Angle of Elevation from point B to point A

  1. Chapter 9 Class 10 Some Applications of Trigonometry
  2. Concept wise

About the Author

Davneet Singh's photo - Teacher, Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.