"Fred's Home Companion--Trigonometry" by Stanley F. Schmidt is a study guide designed for high school and elementary school students studying mathematics. Published by Polka Dot Publishing in 2005, this hardcover book serves as a comprehensive resource for learning about trigonometry. With 128 pages filled with educational content, this book is an essential tool for home study or classroom use. The author's expertise in the subject area ensures that this companion is both informative and accessible for students looking to deepen their understanding of trigonometric concepts.