SOLUTION: In a triangle ABC, the angle at B is 155 degrees, the length of side BC is 29, and the length of side AB is 10. To 2 decimal places, what is the length of side AC?

Algebra ->  Triangles -> SOLUTION: In a triangle ABC, the angle at B is 155 degrees, the length of side BC is 29, and the length of side AB is 10. To 2 decimal places, what is the length of side AC?       Log On


   

Question 986743: In a triangle ABC, the angle at B is 155 degrees, the length of side BC is 29, and the length of side AB is 10. To 2 decimal places, what is the length of side AC?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
Using Cosine Rule:
b^2 = a^2 + c^2 - 2acCosB
b^2 = 29^2 + 10^2 - 2(29)(10)Cos155
b^2 = 1466.659
b = 38.297
b = 38.3 units
Hope this helps :-)