You know that you can take side lengths and find trig ratios, and you know you can find trig ratios (in your calculator) for angles. What is missing is a way to go from the ratios back to the original angles. And that is what "inverse...

Discover sine and cosine ratios in trigonometric ratios.

Understand the right triangle definition of sec, csc, and cot ratios.

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.

Learn how to find the sine, cosine, and tangent of angles in right triangles.

This is an introductory instructional activity about the trigonometric function sine. Students will study several similar right triangles and the ratio of certain two sides in them.

This site has a basic overview of trigonometry focusing on the trig functions, trig ratios, and the unit circle.

Demonstrates how to translate, set up, and solve basic right-triangle word problems.