In this book the author covers topics in mathematics from basic algebra through trigonometry, providing definitions, properties, theorems, terminology, notation, formulas, and examples. The author has also reserved space within the book for the student to work exercises alongside the examples provided. Thus it functions as both a textbook and a workbook. It is especially well-suited to students who:wish to learn algebra or trigonometry without the aid of a teacher; are currently enrolled in a course in algebra or trigonometry at an educational institution but do not want to attend lectures or watch videos online; or have studied algebra or trigonometry in the past but would like to review the subjects. This book does not include an ample set of additional algebraic exercises at the end of each section and may serve a student best when used in conjunction with a separate source of sets of exercises, such as Exercises in Algebra and Trigonometry by the same author. When combined with Exercises in Algebra and Trigonometry, this book will serve instructors and students well in any course in algebra or trigonometry, including those:conducted online; where the classroom is "flipped" and students complete exercises in advance of a lecture from the instructor; where not all students progress at the same pace; where the student learns independently or at home.