What you can do for this case is to use the following trigonometric definition.
sine (x) = a / h
Where,
a: side of the triangle.
h: hypotenuse.
Substituting:
sine (x) = 3/6
x = Arcosine (1/2)
x = 30 degrees.
The other angle is:
180-30-90 = 60 degrees
Answer:
W = 30
V = 60
U = 90
option 4
