The 30^{th} Carnival of Mathematics is up, featuring many intersting posts and some interesting facts about the number 30 (including that 30 is the first *Giuga number*)! This Carnival is hosted by The Number Warrior, a blog by Jason Dyer (who teaches high school mathematics). The Number Warrior also has a recent post I liked that uses triangles on the unit circle to prove 1+csc^{2}θ=cot^{2}θ directly (instead of the way I usually prove it, by starting with sin^{2}θ+cos^{2}θ=1 and dividing through by sin^{2}θ).

Head on over and enjoy the fun!

### Like this:

Like Loading...

*Related*

This entry was posted on April 4, 2008 at 8:06 pm and is filed under Carnival. You can follow any responses to this entry through the RSS 2.0 feed.
You can leave a response, or trackback from your own site.

## Leave a Reply