In reference to the unit circle, 120 degrees is directly corresponding to 2pi/3. Mathematically, you can do 120 x pi/180 and simplify (which gets you to 2pi/3) to figure this out. 5pi/6 radians is equal to 150 degrees. Mathematically, you can do 5pi/6 x 180/pi (which gets you to 150 degrees). Therefore, the two measurements are 30 degrees or pi/6 radians apart from one another
In reference to the unit circle, 120 degrees is directly corresponding to 2pi/3. Mathematically, you can do 120 x pi/180 and simplify (which gets you to 2pi/3) to figure this out. 5pi/6 radians is equal to 150 degrees. Mathematically, you can do 5pi/6 x 180/pi (which gets you to 150 degrees). Therefore, the two measurements are 30 degrees or pi/6 radians apart from one another
