Find an angle that is positive, less than, and coterminal with 690
Subtract 360 from 690
690 -360
The resulting angle of 330 is positive, less than 360 and coterminal with 690
330
Since the angle 330 is in the fourth quadrant, subtract 330 from 360
360 - 330
°
Subtract 330 from 360
Answer is 30