title: Calculate one side of a triangle (Law of Cosines) in javascript or jquery
body: <p>I need to calculate one side of a triangle.
  I have the angles and the width of two sides. After a search I found how to do it but I need to do it with javascript or jquery.</p>
  
  <p>Here is how to calculate <a href="http://www.calculatorsoup.com/calculators/geometry-plane/triangle-theorems.php#law_of_cosines" rel="nofollow">Law of Cosines</a></p>