How do you find co terminal angles (find one positive, and one negative)?

#330 degrees#

1 Answer
Jan 21, 2017

If you are measuring the angles in degrees, you can add and subtract multiples of #360^o#. If you are measuring in radians, add or subtract multiples of #2pi#.

Explanation:

For example, coterminal to #30^o# would be #390^o# or #-330^o#.

Coterminal to #pi/3# would be #pi/3 + (6pi)/3 = (7pi)/3# or #pi/3 - (6pi)/3= (-5pi)/3#.