CBSE Class 10 Maths Chapter 9 Notes Some Applications of Trigonometry

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CBSE Class 10 Maths Chapter 9 Notes Some Applications of Trigonometry

Some Applications of Trigonometry Class 10 Notes Understanding the Lesson

Trigonometry is the study of relationships between the sides and angles of a triangle. In this chapter you will study about some ways in which trigonometry is used:

  • It is used in geography and in navigation.
  • It is used in constructing maps, determine the position of an island in relation to the longitudes and latitudes.
  • It is used for calculating the height and distance of various objects without measuring it.

Terms related to height and distance:

1. Line of sight: The line joining the eyes of the observer and the objects which he/she observes is called line of sight.
Some Applications of Trigonometry Class 10 Notes Maths Chapter 9 1
2. Angle of elevation: (When object is above the horizontal)
The angle between the line of sight and the horizontal is called the angle of elevation.
Some Applications of Trigonometry Class 10 Notes Maths Chapter 9 2

3. Angle of depression: (When object is below the horizontal)
The angle between the horizontal line and the line of sight is called the angle of depression.
Some Applications of Trigonometry Class 10 Notes Maths Chapter 9 3

Trigonometric formulae used:
Some Applications of Trigonometry Class 10 Notes Maths Chapter 9 4

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