Precalculus is a mathematical course that prepares students for calculus. It combines concepts from algebra and trigonometry, focusing on functions, equations, and their properties. Students learn to analyze and graph various types of functions, including linear, quadratic, polynomial, rational, exponential, and logarithmic functions. In addition to functions, precalculus covers topics such as sequences, series, and limits. These concepts help students understand the behavior of functions as they approach certain values. Mastering precalculus is essential for success in calculus and other advanced math courses, as it lays the groundwork for more complex mathematical ideas.