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Class 10 Chapter 9 NCERT - SOME APPLICATIONS OF
TRIGONOMETRY - Class 10 Maths
9.1 Introduction
In the previous chapter, you have studied about trigonometric ratios. In this chapter,
you will be studying about some ways in which trigonometry is used in the life around
you. Trigonometry is one of the most ancient subjects studied by scholars all over the
world.
9.2 Heights and Distances
Let us consider Fig. 8.1 of the prvious chapter, which is redrawn below in Fig. 9.1.
The Angle of elevation and depression, angle of elevation,
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