A triangle has sides A, B, and C. Sides A and B are of lengths #4# and #2#, respectively, and the angle between A and B is #(pi)/8 #. What is the length of side C?
1 Answer
Nov 25, 2016
Explanation:
In order to find out the length of side C, we need to use the cosine rule:
And this is how your triangle (almost) looks like: