This math lesson contains a list of trigonometric addition formulas. Includes example problems involving these formulas along with solutions.

A complete list of the important identities from high school trigonometry, complete with a set of exercises.

This resource is a quick review of the functions and identities in trigonometry.

This site provides a good definition of trigonometry. Includes many links to key terms and many more to related terms. This site may be used as a refresher for students who have finished the course, or students currently studying the...

This personal site is a listing of numerous trig identities. A great reference site.

Shows images of inverse trigonometric function graphs.

Images of trigonometric function graphs.

This is demonstration of how the law of sines works. It uses Java applets to manipulate the triangle and allows the user to explore what happens to the values of the triangle as the sides are changed.

A guide to calculating trigonometric functions.

Given eight trigonometric functions containing absolute value elements, choose whether each is differentiable or non-differentiable. At the conclusion of the exercises, the site returns a score which helps judge understanding of the topic.

This resource is a quick review of the functions and identities in trigonometry.

[Free Registration/Login may be required to access all resource tools.] This lesson applies the trigonometric ratios and their inverses to real-life situations.

[Free Registration/Login may be required to access all resource tools.] Using identities to derive more half angle formulas.

[Free Registration/Login may be required to access all resource tools.] Describing trig functions as relationships on the unit circle.

Three trig tables are provided for student and teacher reference. The first table lists the sine, cosine, tangent, secant, cosecant, and cotangent values of all whole-number angles from 0 to 90. The radian equivalent (to four decimals)...

The formulas for working with the derivatives of inverse trigonometry functions (arccos, arcsin, etc.) are presented here, along with several examples of how to find such derivatives. The exercises allow you to work the problems before...

Trigonometry ratios and their signs are given in this explanation of the other trig functions. Graphs of tangent, cotangent, secant, and cosecant are given. Examples are included.

An overview of the six trig functions and their graphs. The site is a little difficult to navigate but is good for finding a graph of a trig function.

Learn about the trigonometric function, cosecant, with this helpful reference tool. Provides a detailed definition and examples that enhances further explanation.

A practice test that covers proving trigonometric identities and solving advances trigonometric equations.

A comprehensive guide for learning all about tangent functions with definitions, tangent formula, tangent meaning, range and domain of the tangent function, tan function graph, trigonometric ratios, trig identities, solved examples, and...

[Free Registration/Login may be required to access all resource tools.] Define trigonometric relationships with algebraic ratios.

[Free Registration/Login may be required to access all resource tools.] Define reciprocal function.

[Free Registration/Login may be required to access all resource tools.] Define even and odd functions.