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. If applicable, be sure to enter all decimal numbers with a zero in the ones place. Round your final answer to the nearest hundredth.

Question

Deandre Riley

13 April, 16:18

+2

Answers (1)

Know the Answer?

Reuben Dalton · Answer 1

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

a^2 = 144 + 225 - 360 *.5

a^2 = 189

a = 13.748