As a spin-off of the "Trigonometry Game" thread, I have started this new thread to discuss practical applications of the Law of Cosines. My first thought is that it is nice to have a formula that doesn't require a right triangle.
Law of Cosines formulas:dbhguru wrote:
Here is a problem that calls for solving for the angles of a triangle when the lengths of the sides are known. As a hint, think law of cosines.
There are practical applications that call for determining an angle of a plane triangle when the sides are known. Let's first see the solution.
http://www.ents-bbs.org/viewtopic.php?f ... 480#p36068