The Pythagorean Identity states that: (sin x)2 + (cos x)2 = 1
Given sin 0 = V23, find cos 0.
12
cos e =

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.