Area under normal curve

Proof that the area under the normal curve is 1:

http://np6.nfshost.com/math/calculus/normalcurve/

IA #1 Link

A link to an interesting Geogebra applet related to IA #1: Patterns from Complex Numbers

http://mrhodotnet.blogspot.com/2011/02/circle-chord-products-geogebra-applet.html