I haven't been here for a long time, so sorry if this was already posted: http://physorg.com/news6555.html Dr Norman Wildberger has devised a new method of trigonometry that gets rid of sin, cos, tan (and the like) functions and uses algebra instead. It's supposedly straight forward, more accurate in a lot of cases, and more consistant with basic math. it uses properties called quadrance and spread. Does anybody know anything about this? Is it credible?