Teach Yourself Trigonometry

This book is way better than "Trigonometry Demystified." The proofs are formal (rather than historically rooted). There were a few errors I found so far, on pp. 72, 79, 88, 135, and 136.

I teach myself a lot from books. Some books provide little, some a lot. With this book you walk away with a usable knowledge of trigonometry AND invaluable knowledge of how your calculator performs mathematical operations.I've tok trig in high school, but the subject wasn't presented in such an organized and methodical approach. The overview in Chapter 1 provided insights that eluded me in high school. Chapter 2 provided detailed knowledge of my pocket computer and knowledge of it's use to solve trig problems that I never realized before. The examples and solutions provide feedback that the lessons were learned and owned. The subsequent chapters methodically build consistent, solid, usable knowledge. Mr. Abbot continually enables you to compare table-based calculations with your calculator calculations, building your confidence in your ability to do both. IF you've wrestled with other approaches to learning trig, this is THE book to get you through it.I have read Mr. Abbott's Calculus book and find his approach conducive to my learning.