Why do you need to know the cosine law or the Pythagorean theorem? Who cares what type of triangle it is, right? WRONG! Understanding trigonometry basics can go a long way. From determining the proper angle and lengths when you're building pretty much anything (i.e. deck, flower box, picture frame, drywall trim) to designing code to control a robotic arm! As with any math or scientific principle, a good understanding of the basics will set you apart from your peers once you c