Strictly as per the new CBSE course structure and NCERT guidelines, this thoroughly revised and updated textbook is designed for class XI of senior secondary schools (under the 10 + 2 pattern of education). The text is presented in a logical manner. It identifies your problem areas and helps you to solve them. Every effort has been made to make the contents as simple as possible so that the beginners will grasp the fundamental concepts easily. KEY FEATURES ? Large number of solved examples to understand the subject. ? Categorization of problems under: ? Level of Difficulty A (Cover the needs of the students preparing for CBSE exams) ? Level of Difficulty B (Guide the students for engineering entrance examinations). ? 'Learning Objectives' at the beginning of each chapter to enable the students to focus their study. ? Problem Solving Trick(s) to enhance the problem solving skills. Besides this, each chapter is followed by a Chapter Test to test problem solving skills. Working hints to a large number of problems are given at the end of each and every exercise. In a nut shell, this book will help the students score high marks in CBSE, and at the same time build a strong foundation for success in any competitive examination