Question

Given b = 9, c = 14, and A = 62 degrees, use the Law of Cosines to solve for a. Round your answer to the nearest tenth, and enter the number only. Note: The figure is not drawn to scale.

Answer 1

Answer: a = 12.6

Work Shown:

a^2 = b^2 + c^2 - 2*b*c*cos(A)

a^2 = 9^2 + 14^2 - 2*9*14*cos(62)

a^2 = 158.693166177956

a = sqrt(158.693166177956)

a = 12.5973475850259

a = 12.6

Make sure your calculator is in degree mode.