Viewers will see the pencil-protractor method of using the unit circle to obtain the trigonometric functions. The lesson will then be taught using GeoGebra. With technology, the audience will discover that students can obtain a more clear understanding of where the trigonometric functions get their values, in a more accurate illustration.

Presentation Format: 9-12 Session
Grade Band Audience: Preservice and Inservice, 9 to 12