# CBSE Class 11-commerce Maths Trigonometric Functions

#### Degree Measure and Radian Measure

Understand the concept of negative and positive angles. Conversion of degree measure to radian measure of angles and vice versa.#### Graphs of Trigonometric Functions

Define the domain, period and range of the trigonometric functions and plot graph.#### Trigonometric Equations

Distinguish between general and principlal solutions. Find solutions of trigonometric eq. of the form sinx, cosx and tan x = 0 and asin x + bcos x = c.#### Sign of Trigonometric Functions

Values of trigonometric ratios of angles greater than 90 degree using the periodicity and sign convention followed by various trigonometric functions.#### Multiple Angle Formulae

Review of trigonometric formulae and solve problems. Derive the expressions for triple angle and half angle formulae of various Functions.#### Advanced Trigonometric Formulae

Derive expressions for trigonometric functions of tan(x+y) , cot(x+y) ,sin 2x, cos2x and tan2x. Express sin2x cos2x and tan 2x in terms of tan x.#### Sum and Difference Formulae

Derive the formula of sin A +/- sin B, cos A +/- cos B and 2sinxcosy, 2sinxsiny, 2cosxcosy, 2cosxsiny and their application in simplifying the identities#### Basic Trigonometric Formulae

Derive and apply the basic formulae of sine and cosine functions like sin(x+y), sin(x-y), cos(x+y), cos(x-y).#### Introduction to Trigonometric Functions

Fundamental trigonometric identities and problems based on them. Sign Convention of trigonometric ratios in various quadrants#### Sine and Cosine Laws

Sine and Cosine laws