11) sin (A+B+C) = sin A cos B cos C + cos A sin B cos C
                             + cos A cos B sin C - sin A sin B sin C

      cos (A+B+C) = cos A cos B cos C - cos A sin B sin C
                             - sin A cos B sin C - sin A sin B cos C

12) In a D ABC with sides a, b, c.

Index

Introduction

1.1 Functions And Mapping
1.2 Functions, Their Graphs and Classification
1.3 Rules for Drawing the Graph of a Curve
1.4 Classification of Functions
1.5 Standard Forms for the equation of a straight line
1.6 Circular Function and Trigonometry

Chapter 2