Given b = 12, c = 15 and A = 60° in triangle ABC, use the Law of Cosines to solve for
a. Fill in the blank(s) to complete each step. Round your answer to the nearest hundredth.a2 = a0 + 152 - 2a1(15) cos a2°a2 = 144 + 225 - 360(a3)a2 = a4a = a5