…of which I am ..was?…one. If you are one, you want this on your chest? Why?
Because we math nerds know that while everyone knows Sine and Cosine, Tan(gent) is often the neglected one. You can help rectify that with this T shirt. 🙂
Snorg Tees has lots of great T shirts. Not just for math nerds. Go see.
Smart People I Know 
I love snorg tees.
And if you’re a math nerd, you probably already know about xkcd.com ^.^
Oh these are seriously cool. I liked this one 🙂
http://www.snorgtees.com/piberational-p-564.html