As both and determine terminal points in the fourth quadrant, we know that both angles fall between and . We also know that for , and that is strictly increasing along this interval.
This means that the angle with the larger cosine value must be closer to having a measure of 360 degrees than the angle with the smaller cosine value, so .
If they have the same numerator and denominator for example 4/4 and 2/2 are equivalent because you could divide 4/4 to get 2/2 or multiply 2/2 to get 4/4