books.google.com - This best selling author team explains concepts simply and clearly, without glossing over difficult points. Problem solving and mathematical modeling are introduced early and reinforced throughout, so that when students finish the course, they have a solid foundation in the principles of mathematical...http://books.google.com/books/about/Precalculus_Mathematics_for_Calculus.html?id=GEAo2JIlO7cC&q=side&utm_source=gb-gplus-sharePrecalculus: Mathematics for Calculus