PARIS: I said, I’m not taking AP Calculus from Henemen.
Calculus, is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of contemporary mathematics education. It has widespread applications in science, economics, and engineering.
In Season 1, Rory implied she was studying Trigonometry, usually part of pre-calculus mathematics courses. Most likely, she is now preparing to take AP Calculus in her senior year.
The Annotated Gilmore Girls 
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