The Unit Circle gives exact values of trig functions at

Last updated: 7/10/2022

The Unit Circle gives exact values of trig functions at special angles. When the angle is not one of the special angles, we may sometimes use the Summation Identities and the Even/Odd Identities to evaluate it. Rewrite the following trig expression using a Summation Identity and special angles of your choice from the Unit Circle. There are many correct ways to do this, but do not yet find the value. (Do not worry about typing the little o degree symbol.) cos (255°) =