Plane Trigonometry

A wonderful Mathematics book! It's a shame that most college level books are not written in such a straightforward, stand-alone manner. This book requires NO online resources, unlike what is the norm today. It is my favorite to date and is still relevant as reference material.

better than expected

This book was my trig book in College. The instructor, Bill Litzmann, was famous for shunning the use of calculators and required that we work every problem with "a #2 pencil and a legal pad," just like he did. This seemed unfair at the time, but in the long run it's a good idea. That said, this book actually teaches BOTH ways of thinking about trig. It teaches a solid foundation in understanding and working trig problems without a calculator and it also has sections on how to use a calculator to solve problems. It even includes memes for memorizing things like the Sin and Cos of angles by radians. In short, I recommend learning to do trig without a calculator and using this book to do so. Especially if you plan to into multivariable calculus or upper level physics where trig is used constantly, especially in coordinate transformations and rotations.