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This new guide presents a clear, interactive introduction to the key concepts of precalculus, including an algebra review and complete coverage of exponential and log functions, trigonometry, and linear programming. A welcome addition to Wiley's stable of STG math bestsellers, Practical Algebra, Quick Calculus, and All the Math You'll Ever Need. This book offers a proven self-teaching approach applied to a challenging math subject. This valuable STG quickly puts readers in command of all the techniques they'll need to master precalculus.