Khan Academy
Khan Academy: Find Trig Values Using Angle Addition Identities
Find the trigonometric values of various angles that (while they are not special angles) can be expressed as the sum or difference of special angles. Students receive immediate feedback and have the opportunity to try questions...
Government of Alberta
Learn Alberta: Math Interactives: Exploring Trig Ratios
Investigate the cosine, sine, and tangent ratios of trigonometry using this interactive Learn Alberta math resource. Students will use these ratios to determine a right triangle's unknown side or angle. Be sure to follow the link to the...
CK-12 Foundation
Ck 12: Geometry: Trigonometry Word Problems
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to solve word problems using trigonometric ratios.
CK-12 Foundation
Ck 12: Trigonometry: Triple Angle Formulas and Linear Combinations
[Free Registration/Login may be required to access all resource tools.] Advanced applications of trigonometric identities.
Cuemath
Cuemath: Trigonometry
A comprehensive guide for learning all about the basics of trigonometry, the various identities-formulas of trigonometry, solved examples, and practice questions.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Trigonometry Review
The Northeast Parallel Architectures Center, Syracuse University, provides a review and tutorial site on trigonometry. The information is in-depth and can be accessed by clicking on the various links in the outline.
Oswego City School District
Regents Prep: Applications of Trigonometric Graphs
Students can use this site to practice questions dealing with trigonometric graphs. Students are challenged with multiple real-world problems and after solving those problems they can check their solution online.
CK-12 Foundation
Ck 12: Trigonometry: Inverse Trigonometric Functions
[Free Registration/Login may be required to access all resource tools.] This lesson covers the inverses of all six trig functions.
University of Saskatchewan (Canada)
Exercises in Math Readiness for University Study: Trig
Read a lesson, look at examples, and try easy, medium, and advanced problems from a variety of trigonometry topics: radian measure of angles, trigonometric functions, trigonometric identities, and modeling with trigonometric functions.
Texas Instruments
Texas Instruments: Basic Trigonometry
Students will define basic terms relating to trigonometry and use trigonometric ratios.
Cool Math
Coolmath: Pre Calculus Other Identities to Know
One page reference sheet of a quick recall of the Trig Identities.
Wolfram Research
Wolfram Math World: Inverse Trigonometric Functions
A site on inverse trigonometric functions. Contains a definition, a chart showing functions and their domains, formulas, and many links.
Khan Academy
Khan Academy: Trigonometry: Evaluate Inverse Trig Functions
Given a sine, cosine, or tangent value, find the principle angle that has this value. In other words, find the arcsine, arccosine, or arctangent of that value. Students receive immediate feedback and have the opportunity to try questions...
Lawrence Hall of Science
The Math Page: Trigonometry: Inverse Trigonometric Function
Here is a site that clearly and thoroughly explains each of the six inverse trigonometric functions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
Lawrence Hall of Science
The Math Page: Trigonometry: Trigonometric Functions of Any Angle
Here is a site that clearly and thoroughly explains the trigonometric functions of any angle and the polar coordinate system. There are example problems solved, problems for the student to attempt, and answers to the student problems....
Calculator Soup
Calculator Soup: Inverse Trigonometric Function Graphs
Shows images of inverse trigonometric function graphs.
Calculator Soup
Calculator Soup: Trigonometric Function Graphs F(x)
Images of trigonometric function graphs.
Other
Dans Math: Lessons: Trigonometry
College professor Dan Bach reviews basic trig concepts, including trig functions, right triangles, circles, radians, and polar coordinates. Site includes animated graphs and detailed examples.
CK-12 Foundation
Ck 12: Trigonometry: Sine, Cosine, and Tangent Functions
[Free Registration/Login may be required to access all resource tools.] This lesson covers the three trigonometric ratios: sine, cosine, and tangent.
Khan Academy
Khan Academy: Solving for a Side in Right Triangles With Trigonometry
Learn how to use trig functions to find an unknown side length in a right triangle.
CK-12 Foundation
Ck 12: Trigonometric Functions of Angles Greater Than 360 Degrees
[Free Registration/Login may be required to access all resource tools.] Finding the value for trigonometric functions for angles exceeding 360 degrees.
University of Guelph
University of Guelph: Trigonometry Tutorial
A guide to calculating trigonometric functions.
CK-12 Foundation
Ck 12: Trigonometry: Composition of Inverse Reciprocal Trig Functions
[Free Registration/Login may be required to access all resource tools.] Define inverse reciprocal of trigonometric functions.
CK-12 Foundation
Ck 12: Trigonometry: Reciprocal Identities
[Free Registration/Login may be required to access all resource tools.] Find the reciprocal of trigonometric functions