Law of Sines and Cosines help?! please?

In triangle GHI, m < G = 109°, m < I = 15° and h =5. Find g to the nearest tenth.

A. 5.7
B. 4.4
C. 18.3
D. 1.4



In triangle JLK, m < K = 87°, k = 9, and l = 6.6. Find j to the nearest tenth.

A. 12.3
B. 12.4
C. 6.5
D. 8.8
Update: I have no idea how to use that formula! can someone at least demonstrate it?
2 answers 2