Question

A triangle has sides A, B, and C. Sides A and B are of lengths `7` and `2`, respectively, and the angle between A and B is `pi/3`. What is the length of side C?

Answer 1

Length of side `color(brown)(c = 5.362`

Explanation:

Applying law of Cosines,

`c = sqrt(a^2 + b^2 - (2 * 7 * 2 cos (pi/3) ) = 5.362`