Math.U.See Pre Calculus with TrigonometryMath. U. See Pre Calculus with Trigonometry Trigonometry, identities, polar equations, logarithms, sequences, limits and other topics to prepare for calculus. Major Concepts and Skills Include: Understanding and working with trigonometric ratios, their reciprocals, and their inverses Working with trigonometric expressions and identities Understanding and working with polar coordinates and radian measure Graphing and analyzing trigonometric functions