Text provides a totally painless way to learn the fundamentals and general concepts of trigonometry. Uses prose and illustrations to describe the concepts, offers questions at the end of each chapter and section, and includes a 100-question self-test. Softcover.
I never took Trigonometry in school. I'm glad. That would have been a waste. This book is faster.
Gibilisco's writing is dry and he makes no attempts to bring great insight to the subject. Like any bored-out-of-his-mind teacher he gives you the terminology, shows you some examples, and quizzes you on them. You'll know basic trigonometry when you're done.
This is a boring book for a boring (on its own) subject. But the trigonometric functions are important to understand. So get through it as quickly as you can and try to remember it.
NOTE: I didn't actually "like" this book as my three-star rating would seem to indicate. Instead, it was just "ok." But I learned the subject, so two stars looked wrong.