SOLUTION: This problem refers to triangle ABC. If a = 100 inches, b = 62 inches, and C = 60°, find c. (Round your answer to the nearest whole number.) c = in

Algebra ->  Triangles -> SOLUTION: This problem refers to triangle ABC. If a = 100 inches, b = 62 inches, and C = 60°, find c. (Round your answer to the nearest whole number.) c = in      Log On


   



Question 1135788: This problem refers to triangle ABC.
If a = 100 inches, b = 62 inches, and C = 60°, find c. (Round your answer to the nearest whole number.)
c = in

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
If a+=+100 inches, b+=+62 inches, and C+=+60°, find c.

use law of cosine
c%5E2=a%5E2%2Bb%5E2-2ab%2Acos%28C%29
c%5E2=100%5E2%2B62%5E2-2%2A100%2A62%2Acos%2860%29
c%5E2=10000%2B3844-12400%2A0.5
c%5E2=7644
c=sqrt%287644%29
c=87.43
c87 inches