law of sines and cosines

Question

In triangle ABC,if A=120 degrees, b= 60ft, and a=150ft, find B.

a.20.3 degrees

b.20.3 degrees or 159.7 degrees

c.16.9 degrees or 159.7 degrees

d.No solution

Answer 1

sin 120 / 150 = sin B / 60

0.866 / 150 ≈ sin B / 60

0.006 ≈ sin B / 60

0.346 ≈ sin B

20.24 ≈ B