*** Purpose of this Book *** To quick revision of all topics for how to solve various problems of Engineering Mathematics III according to chapters before going to a day of exam. To supply collection of Mathematical formula, Introduction, Definition, Proofs, Derivations, Steps of How to Solve Examples and tables this will prove to be valuable to students in the field of mathematics. PREFACE It gives me great pleasure to present to you this book on A Textbook on "The Handbook on Engineering Mathematics III" presented specially for you. It is sincerely hoped that this handbook will help and better equipped the engineering under graduate students to prepare and face the examinations with better confidence. I have endeavored to present the book in a lucid manner which will be easier to understand by all engineering students. It is hoped that this book will meet more than an adequately the needs of the students they are meant for. I have tried our level best to make this book error free.