We have the angle of 60°
x is the adjacent leg to the angle of 60°
and 8 is the hypothenuse
Then we must use a function that relates the adjacent leg with the hypothenuse. We have two options: cosine or secant. We don't have in the options cosine, then we must use secant.
sec 60°= hypothenuse / Adjacent leg
sec 60"=8 / x; sec 60°=2
2=8 / x
2x=8
x=4
Answer: First option
HOPE IT HELPS!