How to determine the values of angles using a trigonometric circle. Angles larger that 360

Trigonometry - Angles, Triangles, Sines

The Unit Circle: Algebra 2/Trig. - Math Lessons

Unit Circle: Sine and Cosine Functions

Important Trigonometry Angles - Formulas, Table & Examples

Important Trigonometry Angles - Formulas, Table & Examples

How to find angles and trig functions using a unit circle - Quora

Radians

Unit circle - Wikipedia

High School Trigonometry/Trigonometric Functions of Any Angle - Wikibooks, open books for an open world

Angles Measured in Degrees and Radians - Wolfram Demonstrations Project

Let's Learn The Unit Circle/Angles in Standard Position/Arc Length