The book presents the subject matter in full conformity with the syllabi prescribed by Jharkhand Technical University, Jharkhand. To keep pace with changing trends in technical education at state level, the whole text has been arranged strictly according to diploma engineering pattern. The book provides a result oriented training to young students. The text has been studded with simple self-study questions, so as to provide an insight and proper grip over the topic, as one learns it. The article work in each chapter of a unit coupled with well graded and carefully selected solved numerical problems for easy comprehension for the beginners. These numericals have been focussed on board pattern.* Functions, Limits and Continuity * Differentiation and its Meaning in Engineering Situations * Application of the Differentiation * Statistics * Complex Numbers