Please explain to me how you get y and what y is for both problems
Thank you appreciate it !

4.
cos (angle) = Adjacent leg / hypotenuse
Cos(30) = Y / 16
Y = 16 * cos(30)
Y = 8√3
5.
cos(angle) = Adjacent Leg / hypotenuse
cos(Y) = 55/75
y = Arccos(55/75)
Y = 42.833 degrees. (Round answer as needed)