Quadrant 3
Explanation:Given:
The quadrant of the terminal side of the angle
To find:
the quadrant if 180 is subtracted to get the reference angle
To determine the correct quadrant, we need to list the measure of the reference angle for each quadrant
Quadrant 1 (90°): the reference angle is θ
Quadrant 2 (90° - 180°): the refrenece angle is 180 - θ
Quadrant 3 (180° - 270°): the reference angle is θ - 180
Quadrant 4 (360°): the reference angle is 360 - θ
From the above, 180 is subtracted from the angle to get the reference angle in Quadrant 3
