Texas Education Agency
Texas Gateway: Ap Macroeconomics: References
This resource presents a topical annotated bibliography of references used in this AP Macroeconomics online textbook.
Paul Dawkins
Paul's Online Notes: Logarithmic Differentiation
Online notes with examples and solutions.
Cool Math
Coolmath: The Pythagorean Identities
One page reference sheet of a quick recall of the Pythagorean Identities.