There are many, many proofs of the Pythagorean Theorem, even one written by U. S. President Garfield, who was a mathematician. But where does the Pythagorean Trigonometric Identity come from?

The proof of it is attached.

Pythagorean identity proof

### Like this:

Like Loading...

*Related*

Tags: Proof Pythagorean Identity, Pythagorean Theorem, trig identities, working with identities

This entry was posted on May 24, 2013 at 7:01 pm and is filed under Geometry, Precalculus. 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