Trigonometry DeMYSTiFieD, Paperback by Gibilisco, Stan, ISBN 0071780246, ISBN-13 9780071780247, Brand New, Free shipping in the US Presents an introduction to trigonometry, providing simplified explanations of such topics as mapping, functions, vectors, the unit-circle paradigm, and polar coordinates, with quizzes at the end of each chapter, along with answers and explanations.