Answer: 1/3
Explanation:
From SOH-CAH-TOA's rule, the cosine of a point is the length of it's adjacent side divided by the length of the hypotenuse of the given trangle or the side opposing the right angle.
In this case, the cosine of W is the the length of it's adjacent side which is 2 divided by the length of the hypotenuse which is 6 so the cosine of W is 2/6 or 1/3