# If a = 4, b = 5, and c = 6, how do you solve the triangle?

##### 1 Answer

May 18, 2015

Use identity:

36 = 25 + 16 - 40.cos C --> cos C = 5/40 = 0.125 --> C = 82.82 deg

sin^20 C = 1 - cos^2 C = 0.98 -> sin C = 0.99

Next, use trig identity:

B = 180 - 41.30 - 82.82 = 55.88