This book is about trigonometry, of course, and is for any student who wants to study it seriously. And in particular, it covers the area in depth and extent so that it can be good for those students, too, who want to study calculus later or now in university level, and want to be science or engineering majors. And some sample pages are at: http://www.runmath.com/ExcerptFromTrigSeongKim.pdf And note that you can get the book in parts, too. There are three parts. One is Algebra Examples Trigonometry 1, which is the first third of the whole book, which is this book. Another is Algebra Examples Trigonometry 2, which is the second third of the book. And the other is the last third, called Algebra Examples Trigonometry 3.