This textbook has been in constant use since 1980, and this editionrepresents the first major revision of this text since the secondedition. It was time to select, make hard choices of material,polish, refine, and fill in where needed. Much has been rewrittento be even cleaner and clearer, new features have been introduced,and some peripheral topics have been removed. The authors continue to provide real-world, technicalapplications that promote intuitive reader learning. Numerousfully worked examples and boxed and numbered formulas give studentsthe essential practice they need to learn mathematics. Computerprojects are given when appropriate, including BASIC, spreadsheets,computer algebra systems, and computer-assisted drafting. Thegraphing calculator has been fully integrated and calculatorscreens are given to introduce computations. Everything thetechnical student may need is included, with the emphasis always onclarity and practical applications.