## CBSE NCERT Solutions for Chapter 9 Some Applications of Trigonometry Class 10 Maths

In the chapter, as the name says, we will be studying about some ways in which trigonometry is used in the life around you. As we have said in Chapter 8, trigonometry was invented because its need arose in astronomy. Since then the astronomers have used it, for instance, to calculate distances from the Earth to the planets and stars. Trigonometry is also used in geography and in navigation. The knowledge of trigonometry is used to construct maps. Here basically application of trigonometry is discussed to find height and distances. The questions are asked to find height of buildings, towers etc. using angle of elevation and depth using angle of depression. Questions are asked to find the length of ladder etc also. There is only one NCERT exercise which has questions related to height and distances when particular angles are given.