Emphasizing the usefulness of mathematics, this thorough revision offers a direct, easy to comprehend treatment of college algebra and trigonometry. A review of basic algebra reminds students of material they've studied previously and will be using later in the text. Using an angle-in standard position introduction to trigonometric functions, with emphasis on right-triangle applications, Gustafson and Frisk continue to offer solid preparation for future mathematics, especially calculus. The Fourth Edition contains new emphasis on both scientific and graphing calculators and a more visual approach. The Gustafson and Frisk style remains P easy to teach from, easy to learn from because of the book's streamlined development of topics, the correct amount of material in each section, and its no-nonsense, straightforward approach.