Digital library
Textbooks, references and open learning resources.

External
Precalculus
Carl Stitz & Jeff Zeager · Lakeland Community College & Lorain County Community College
LibreTexts

External
Precalculus
Jay Abramson · OpenStax
This precalculus textmap is intended for college-level Precalculus students and is a comprehensive book that covers more ground than an instructor could likely cover in a typical one- or two-semester course; but instructors should find, almost without fail, that the topics they wish to include in their syllabus are covered in the text.

External
Precalculus: Algebra and Trigonometry (Math 4 - FCC)
David Yang, Jeremy Brandl, Laurel Blackerby-Slater, Leila Nabi & Nate Allen · Fresno City College
LibreTexts

External
Corequisite Companion to Precalculus
Jennifer Freidenreich · Diablo Valley College
LibreTexts

External
Corequisite Precalculus
Katherine Skelton · Highline College
This course includes, but not limited to piece-wise, composite, inverse, polynomial, rational, exponential, and logarithmic functions. Also discussed are properties of functions, their relationship to equations and inequalities, as well as applications, and circles.

External
Math C170: Precalculus (Tran)
Chau D. Tran · Coastline College
This precalculus textmap is intended for college-level Precalculus students and is a comprehensive book that covers more ground than an instructor could likely cover in a typical one- or two-semester course; but instructors should find, almost without fail, that the topics they wish to include in their syllabus are covered in the text.

External
Math 3AC: Analytic Geometry and Calculus I
Kenn Huber · Irvine Valley College
A new take on the classic mathematical approach of learning Precalculus and Calculus separately, this book merges the two topics together. Using calculus notation to inspire the precalculus examples helps students of either a Precalculus or Calculus with support course.

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Elementary Trigonometry
Richard W. Beveridge · Clatsop Community College
Ancient trigonometry typically used angles and triangles that were embedded in circles so that many of the calculations used were based on the lengths of chords within a circle. The relationships between the lengths of the chords and other lines drawn within a circle and the measure of the corresponding central angle represent the foundation of trigonometry - the relationship between angles and distances.

External
Trigonometry
Katherine Yoshiwara · Los Angeles Pierce College
This text covers the content of a standard trigonometry course, beginning with a review of facts from geometry.

External
Active Prelude to Calculus
Matthew Boelkins, David Austin & Steven Schlicker · Grand Valley State University
This text is designed for college students who aspire to take calculus and who either need to take a course to prepare them for calculus or want to do some additional self-study. Many of the core topics of the course will be familiar to students who have completed high school. At the same time, we take a perspective on every topic that emphasizes how it is important in calculus. The reader will find that the text requires them to engage actively with the material.

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Conceptual Mathematics in Society
Ricela Feliciano-Semidei · Northern Illinois University
This textbook supports a strong preparation for the precalculus and calculus sequence through college-level skills to complete mathematical work and to develop conceptual understanding, rather than focusing solely on memorization and repetition of processes.

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Elementary Trigonometry
Michael Corral · Schoolcraft College
This is a text on elementary trigonometry, designed for students who have completed courses in high-school algebra and geometry. Though designed for college students, it could also be used in high schools. The traditional topics are covered, but a more geometrical approach is taken than usual. Also, some numerical methods (e.g. the secant method for solving trigonometric equations) are discussed. A brief tutorial on using Gnuplot to graph trigonometric functions is included.

External
Trigonometry
Ted Sundstrom & Steven Schlicker · Grand Valley State University
This trigonometry textbook this book is not just about mathematical content but is also about the process of learning and doing mathematics. That is, this book is designed not to be just casually read but rather to be engaged. Since this can be a difficult task, there are several features of the book designed to assist students in this endeavor. In particular, most sections of the book start with a beginning activity that review prior mathematical work that is necessary for the new section.

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Calculus
Eric Hutchinson · College of Southern Nevada
In the contents: 01: Functions and Graphs (Precalculus Review)

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MATH 1200: Calculus for Scientists I
Pamini Thangarajah · Mount Royal University
In the contents: 0E:Precalculus Review

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Mathematics for Business and Policy
Michael Hill and Andrew Jenkins · Indiana University
In the contents: 01: Precalculus

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Differential Calculus for the Life Sciences
Leah Edelstein-Keshet · University of British Columbia
In the contents: 17.02: Appendix B- A precalculus review

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Math 4A: Multivariable Calculus
Kenn Huber · Irvine Valley College
In the contents: 01: Multivariable Precalculus

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MTH 226: Calculus III
LibreTexts
In the contents: Precalculus Review