Pre-Calculus For Dummies : Brush up on algebra and trig concepts and get a glimpse of calculus. Understand the principles and problems of pre-calculus. Getting ready for calculus, but feel confused? Have no fear! This unintimidating, hands-on guide walks you through all the essential topics, from absolute value and quadratic equations to logarithms and exponential functions to trig identities and matrix operations. You'll understand the concepts - not just the number crunching - and see how to perform all tasks, from graphing to tackling proofs. Apply the major theorems and formulas. Graph trig functions like a pro. Find trig values on the unit circle. Tackle analytic geometry. Identify function limits and continuity.