What is the length of AB?
A) 6.2
B) 12.3
C) 5.0
D) 15.1

Answer:
5.02
Step-by-step explanation:
Hi,
you can trigonometric formula here.
tan 60= opposite / adjacent
tan 60 = AC/ AB
AB = AC / tan60
AB = 8.7 / tan60
AB = 5.02