As the best seller in its field, Precalculus Functions and A Graphing Approach, is the choice for precalculus courses that require students to use graphing technology, begin with a faster paced algebra review, and introduce trigonometry first with a unit circle approach, then the right triangle. The Third Edition offers both instructors and students a more solid, comprehensive, and flexible program than ever before. For a complete listing of features, see Larson/Hostetler/Edwards, College A Graphing Approach, 3/e.
Pretty good at explaining needed pre-calculus concepts. Went through most of this book when I prepared to take calculus as it had been years since I took pre-calculus. It definitely helped.