Key Concepts
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.