Relates the unit circle to the method for finding trig ratios in any of the four quadrants. Demonstrates how the unit circle might be useful.

[Free Registration/Login Required] Students describe, analyze, and reason angles being as small or as large as they can imagine. Using trigonometrical ratios, this is a fun exercise in understanding how to examine the perfect graph.

An introduction to solving trigonometric equations by using the reciprocal, negative, Pythagorean, and cofunction identities. Includes several examples and exercises with solutions at the bottom of the page.

Activities in this lesson explore how to identify the coordinates where special right triangles intersect with the unit circle in all four quadrants, use both degrees and radians to identify angles, and explore angles of different sizes...

Northeast Parallel Architectures Center of Syracuse University provides a quick reference chart of the exact values of the sine, cosine, and tangent functions for the most common angle measrements in the first quadrant. Includes both...

For this task, students are give values for sin, cos, or tan, and use them to find the missing value as well as the quadrant of the angle. Aligns with HSF-TF.C.8.