A single angle can be given many different measures, all of which can be reduced to one angle between 0 and . First remember that we can always add or subtract since that is just going around the complete circle once, getting back to the same angle. Because the angle given has a denominator of "6", note that

which is between 0 and . What is the supplement of that? Does it have a complement?

Since the angle is given in radians, as a multiple of , you should do the problem that way. You should not have to convert to degrees. That takes time and does not contribute anything. Also, your angle is NOT "3.8 radians", it is radians, which is [b]approximately[/tex] -3.7 radians. You should not have to approximate.