Question

A triangle has sides A, B, and C. Sides A and B are of lengths `8` and `5`, respectively, and the angle between A and B is `pi/6`. What is the length of side C?

Answer 1

`c ~~ 4.44`

Explanation:

Use the Law of Cosines:

`c^2 = a^2 + b^2 - 2(a)(b)cos(theta)`

`c^2 = 8^2 + 5^2 - 2(8)(5)cos(pi/6)`

`c ~~ 4.44`