Lessons

Find values of trigonometric functions using a unit circle
In this lesson, you will find the values of the sine, cosine and tangent functions, by using a unit circle.
Resources
Explain how the unit circle in the coordinate plane enables the extension of trigonometric functions to all real numbers, interpreted as radian measures of angles traversed counterclockwise around the unit circle.
In this lesson, you will find the values of the sine, cosine and tangent functions, by using a unit circle.