Precalculus, 7th Revised edition--------------------------------------------------"The Barnett, Ziegler, Byleen, and Sobecki's ""College Algebra"" series"is designed to be user friendly and to maximize student comprehensionby emphasizing computational skills, ideas, and problem solving asopposed to mathematical theory. Suitable for either one or two semester" college algebra with trigonometry or precalculus courses, ""Precalculus"""introduces a unit circle approach to trigonometry and includes a chapteron limits to provide students with a solid foundation for calculusconcepts. The large number of pedagogical devices employed in thistext will guide a student through the course. Integrated throughoutthe text, students and instructors will find Explore-Discuss boxeswhich encourage students to think critically about mathematical concepts.In each section, the worked examples are followed by matched problemsthat reinforce the concept being taught. In addition, the text containsan abundance of exercises and applications that will convince studentsthat math is useful. There is a MathZone site featuring algorithmicexercises, videos, and other resources that accompanies the text.