Sound elaborates the concept of sound along with the terms related to it. It deals with concepts like amplitude, frequency, vibrations, mechanics behind SONAR and the velocity of sound.
This chapter teaches you about the arithmetic progression and other terms related to it such as common difference, the first term, nth term, and also the sum of all the numbers in a given arithmetic progression. It tells you the relationship between the nth term of the progression and sum of n terms of the same.
In this chapter, you will be introduced to the concept of similar triangles and the different criteria by which the similarities can be established, Basic proportionality theorem, Pythagoras theorem, and several other important theorems.
You will be introduced to new concepts such as distance formula and section formula besides the revision of abscissa and ordinate of point and an interesting method to calculate the area of a triangle using coordinate geometry.
This chapter teaches you about the applications of trigonometry viz. the line of sight, angle of depression and elevation, height or length of an object.
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