Answer
The answer is below.

Work Step by Step
Given: $-3 rad $ $=-171.9^{\circ}$
The standard position of an angle occurs when we place its vertex at the origin of a coordinate system and its initial side on the positive x-axis.
A positive angle is obtained by rotating the initial side counterclockwise until it coincides with the terminal side. Likewise, negative angles are obtained by clockwise rotation.
