Quick Review The two most common measurements of angles are degrees and radians. Remember from Technical Mathematics 1 that a degree is of a circle, and a radian is of a circle. An entire circle contains 360° or radians. To convert from degrees to radians, multiply the number of degrees by To convert from radians to degrees, multiply the number of radians by Example 1 Convert 72° to radians Example 2 Convert radians to degrees We can evaluate trigonometric functions which are in degrees or radians. If you are using a calculator, remember to have it in the proper mode. Examples 1) 2) 3) cos = -0.9135 |