This is as much of a guide to solving problems as it is to the study of trigonometry. Tanton opens each chapter with an explicit statement of the Common Core topics that are being addressed in that chapter. They are a reminder that in mathematics, a common core of learned topics has been a part of our agenda for a long time. Using text and diagrams, the topics of the chapter are then explained.
This is followed by a featured problem for the chapter, where the author recapitulates t…