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Mathematics for Class XI is a reference book by R. D. Sharma for students of class XI following the syllabus issued by the Central Board of Secondary Education. Summary Of The Book Mathematics for Class XI is a reference book aimed at helping students of Class XI in their efforts to prepare for class exams as well as to provide a good foundation in the preparation for competitive exams. The chapters in this book provide a description of concepts covered in Class XI, along with a multitude of problems for each chapter. The book has an algorithmic approach and comes with clear explanations of the theory supplemented by illustrations, making concepts easy to understand and remember. The book also contains concise summaries of concepts and formulae at the end of each chapter, making it a good book to have handy for revisions just before the exam. For students looking to learn by practice, this book is a great source for problems. It comes with many exercises, and the problems listed are graded and come with the solved answers. The book also contains a number of exercises with unsolved problems that the student may use to further sharpen his/her skills. Mathematics for Class XI addresses the entire syllabus for Class XI. Some topics covered in the book include trigonometric equations, functions, ratios, and graphs of trigonometric functions, sine and cosine formulae and their applications, mathematical induction, and transformation formulae. With detailed explanations of the theory and a wealth of solved and unsolved problems, this book makes for a reliable source book for Class XI students to help in their efforts of doing well in their competitive exams. About R. D. Sharma R. D. Sharma is an Indian author and teacher. He is a widely published author of Mathematics textbooks and reference books. Some other books by R. D. Sharma include Mathematics for Class XII, Mathematics for Class 12 (Set of 2 Volumes), Objective Mathematics For IIT-JEE, AIEEE and All Other Engineering Entrance Examinations, and Mathematics Class-VII. R. D. Sharma has a Doctorate in Mathematics, and completed his Bachelor’s and Master’s degrees, with Honours and double gold medals, from the University of Rajasthan. He is presently with the Directorate of Technical Education, Delhi, serving as the Head of Department, Science and Humanities.