Trigonometry

A Classic Approach to Trigonometry, Refined for Today’s Learners

For decades, the Lial team has helped students build confidence in mathematics through clear explanations, carefully structured examples, and abundant practice. The 12th edition of Trigonometry continues that tradition, offering a focused yet thorough introduction to trigonometric concepts and their real-world applications.

This edition brings together Margaret L. Lial, John Hornsby, David I. Schneider, and Callie J. Daniels, whose classroom experience shapes every chapter. The result is a resource that respects the challenges students face while providing the support needed to succeed.

What You’ll Find Inside 📐

The book opens with an algebra review that refreshes essential skills before moving into core trigonometric material. The early chapters lay a strong foundation by covering:

• Angle measurement and basic terminology
• Right-triangle and general trigonometric functions
• Acute angles, reference angles, and special angle values
• Applications including solving right triangles and using bearings

Each chapter includes test prep, review exercises, and a chapter test, reinforcing learning and helping students gauge their understanding.

Built-In Support with MyLab Math 💻

This edition is designed to work seamlessly with MyLab Math, Pearson’s online learning platform. Students gain access to interactive exercises that mirror the textbook, instructional videos for every example, and a fully searchable eText that works even offline. These tools make it easier to practice independently and get immediate feedback.

Who Will Benefit from This Book?

This textbook is widely used in college trigonometry and precalculus courses. It is particularly helpful for students who want a clear, example-driven path through the subject, as well as instructors looking for a reliable teaching framework with integrated digital resources.

Bring the 12th Edition into Your Study Routine

If you’re preparing for a course, reviewing for a test, or brushing up on trigonometric skills, this digital edition gives you the flexibility to learn on your own schedule. Add it to your Digital Delights library and start building a stronger mathematical foundation today.