*Reciprocal Identities*

*Quotient Identities*

*Pythagorean Identities*

*Cofunction Identities*

*Even/Odd Identities*

While the majority of these identities should be familiar by now, the Pythagorean Identities are new. So, let's examine them.

__Using GSP to Verify the
Pythagorean Identities__

Consider the following construction:

Now, take a look at this.

To manipulate the file that created these sketches, click here.

OR, if you don't have GSP, click here for a web page that shows the construction, but not the identities.

Back to Lesson Six