Trigonometric Identities and Formulas There are three systems of measuring Angles- 1. Circular

# SSC-Maths

## Theory: Mensuration

Important Formulas of Mensuration (2-D Figures) (3-D Figures) Some Important Formulas Theory on

## Algebraic Expressions and Identities

Important Algebraic Expressions and Identities :- a3 - b3 = (a - b) (a2 + b2 + ab) (a + b)3 = a3

## Theory : Average

Important Facts and Formulas - Average Definition- The number of quantities of the same kind is

## Theory : Boat and Stream

Up Stream - It means the boat is moving against the direction of the stream. Down Stream – It

## Theory : Partnership

Important Concepts of Partnership When the investment is made for the same time period by all the

## Problems on Train

Time taken to cross a Platform - Length of (Train + platform) to Speed of Train Time taken to