Trigonometric Functions and the Unit Circle

Radians are another way of measuring angles, and the measure of an angle can be converted between degrees and radians.

Identifying points on a unit circle allows one to apply trigonometric functions to any angle.

The unit circle and a set of rules can be used to recall the values of trigonometric functions of special angles.

The functions sine and cosine can be graphed using values from the unit circle, and certain characteristics can be observed in both graphs.

Characteristics of the tangent function can be observed in its graph.

Trigonometric functions have reciprocals that can be calculated using the unit circle.

Each trigonometric function has an inverse function that can be graphed.