ClipArt ETC
Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with the x- and y-axes indicated. The circle is marked and labeled in radians. All quadrantal angles and angles that have reference angles of 30°, 45°, and 60° are given in radian measure in terms of pi. At each angle, the coordinates are given. These coordinates can be used to find the six trigonometric values/ratios. The x-coordinate is the value of cosine at the given angle and the y-coordinate is the value of sine. From those ratios, the other 4 trigonometric values can be calculated.

Unit Circle Labeled With Special Angles And Values

Illustration of a unit circle (circle with a radius of 1) superimposed on the coordinate plane with…

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, both angles are labeled with the proper degree measure.

30° and -330° Coterminal Angles

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, neither angle is labeled.

30° and -330° Coterminal Angles

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the negative angle is labeled with the proper degree measure.

30° and -330° Coterminal Angles

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn…

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the positive angle is labeled with the proper degree measure.

30° and -330° Coterminal Angles

Illustration showing coterminal angles of 30° and -330°. Coterminal angles are angles drawn…