Answer:
The answer is 18 1/16. :)
none of these are correct
Step-by-step explanation:
a)
Cos60=1/2=0.5
b)
cos60=4/x
0.5=4/x
0.5x=4
0.5x/0.5=4/0.5
x=8
x is 4 when y is 180
y is 540 when x is 12
