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Pythagorean

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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?