Welcome! 

My office is MSC 223 by the vending machines.

Can you fold a piece of unmarked paper so it has a perfect 30º angle?  Try it, then try this origami site.

 
 
 

Trig students:  Why is the red dot at the origin when the blue dot is at maximum distance from the origin?  Remember, the blue dot represents the displacement from equillibrium for a harmonic oscillator.