How do you use the law of cosines or law of sines if you are given a=11, b=7, c=9?
1 Answer
Jun 16, 2015
Solve triangle by Law of cosines and sines
Explanation:
To find a triangle's angle use the Law of Cosines
49 = 121 + 81 - 198cos B
Angle C = 180 - B - A = 180 - 39.40 - 85.90 = 54.70