Geyer has books that cover many math topics, including calculus and trigonometry. Our books make learning math fun and easy. The terminology is simplified so any student can understand the concepts. Our Quick Study guides are 3-hole punched so it can be easily stored in binders. Students can reference this page for homework or in class to remember equations, definitions, and principles. The Quick Study guide are in Pre-Calculus, Calculus, Calculus 2, and Trigonometry.