This trigonometry textbook takes the learner from a basic understanding of angles and triangles through the use of polar coordinates on the complex plane. Written by a mathematician-engineer, examples and problems here are used to...

Move on into trigonometry. An informative eBook takes the content of a College Algebra course and adds more relating to trigonometry and trigonometric functions. The content organization allows pupils to build upon their learning by...

Take a step beyond Algebra 2. Learners use the eBook to learn concepts from the typical Precalculus course. Content starts off with a short review of functions in general and moves on to the basic functions, finishing up with more...

Differentiate between calculus concepts. The beginning of a helpful calculus resource begins with a short review of functions and moves right into limits to define derivatives. The six-chapter resource continues with applications of...

Everything you wanted to know about calculus—and more! The resource is a complete Calculus textbook with explanations, examples, and practice problems. 

Get information about trigonometric functions by viewing examples and a video lesson. [2:08]

This site provides an explanation on the limits of trigonometric functions. Topics included on the site are infinite limits, no limits at infinity and a fundamental limit.

Explore how changes to the equations of sine and cosine functions affect the graphs of the functions through transformations (stretches and shifts).

This section explores the relationship between right triangles, circles, and trigonometry. It investigates how a right triangle that is set inside a circle and rotates around the circle is connected to trigonometric functions and their...

Provides an explanation, examples, and a video lesson all related to trigonometric identities. [2:31]

Define the trigonometric ratios in terms of ratios of the sides of a right triangle.

An example and a video lesson help to explain inverse functions. [0:38]

Explanation of circular functions through the use of examples and a video lesson. [1:10]

This lesson focuses on trigonometry including the trigonometric functions: sine, cosine, and tangent.

This lesson will explore how real life examples of periodic behavior can be modeled with Trigonometric Functions.

This Algebra 2 course has interactivity included in every lesson. Lessons include questions with immediate feedback to help you learn along the way, videos, lots of interactives (PLIX and Sims), and Adaptive Practice questions help you...

Rather than dividing a circle into some number of segments (like 360 degrees), mathematicians often prefer to measure angles using the circumference of a unit circle - a circle with radius 1. This way of measuring angles is called...

A complete high school Precalculus Concepts course. Includes 'Related Modalities' for each lesson that teach the same concept in different ways. The text materials follows Algebra II and comes before Calculus or Statistics. The content...

Features a definition, examples, and a video lesson all related to angles. [0:35]

Defines and examines the law of sines through examples and a video lesson. [2:02]