Question

Determine whether the Law of Cosines or Sines should be used when given the following information:

a = 160, B = 12 degs, and C = 7 degs

I think the Law of Cosines should be used.

Answer 1

Law of cosines are used when you know 2 legs and 1 angle of the triangle. The information only provides 1 leg and 2 angles

Answer 2

Law of sines are used when you know 1 leg and 2 angles

Answer 3

Based on the information provided, Law of Sines should be used