* A one semester precalculus course taught at two- and four-year schools..* Takes the unit circle approach to subject..* Shows how to use formulas in the word problems..* Step-by-step explanations, or side-bar comments, are added to examples.
I do not know about you. But I can study math a lot better if the book has a hard cover. This first chapter assumes you are coming from ground zero and is good to read just to brush up or see if there is anything new, that you missed originally. There is a smooth transition and a gradual complexity as you go from the fundamentals through the subject. Now some people will complain that it is not all practical or applied. This was not designed as a course for practical or applied. However, it sure helps when reading other books that can only explain things in at least rudimentary math.
Even the fundamentals of trig are needed to follow The Ascent of Man by Jacob Bronowski. Now I call that practical.