wurst wrote:
http://www.biologie.tu-dortmund.de/de/content/personal/homepages/graf/vorlesungsunterlagen/loesung.htm
Yeah, getting angle with arctan is way to prove it.
This things come to exist when some people think they are nerds, if they can fool 1st graders... Person who made it probably didn't know what arctan is at all... Or expected other not to know.
BTW: why is that on biology part of university?