4. Use the law of sines or cosines to solve the triangle. a. B 116, a, 7.6, c = 4 b. B 116, a = 4, c = 7.6 c. B 139, a 5.9, c = 9.2 d. B = 139, a = 9.2, c = 5.9 B 43 2 A 10