A triangle has sides A, B, and C. Sides A and B are of lengths #8# and #9#, respectively, and the angle between A and B is #(5pi)/12 #. What is the length of side C?
1 Answer
Dec 16, 2016
Explanation:
The Law of Cosines tells us that
where
using a calculator (or spreadsheet) should (if I haven't messed up) give the answer above.