Understanding the essential mathematics for physics is crucial for students aiming to excel in the field. High school mathematics, including algebra, geometry, and trigonometry, forms the foundational skills necessary before advancing to calculus and beyond. While textbooks may not cover every topic in depth, this is due to varying educational approaches rather than the irrelevance of certain content. The "extra" material in textbooks is often valuable for self-study, as students may need to explore topics not fully addressed in their courses. For those comfortable with high school material and seeking further guidance, resources like Mary Boas's "Mathematical Methods in the Physical Sciences" are recommended, as they cover a significant portion of the mathematics needed for physics majors. Ultimately, mastering basic concepts is essential before delving into more advanced topics, and students should be prepared to learn independently as they progress in their studies.