Use the Law of Cosines to determine the indicated side x. (Assume b = 18 and c = 36.

Question

Use the Law of Cosines to determine the indicated side x. (Assume b = 18 and c = 36. Round your answer to one decimal place.)

x =

Answer 1

x= square root of (18^2+36^2-2(18)(36)cosX)

plug in angle X, the angle between sides b and c

and simplify