# Precalculus An Investigation of Functions

- By: David Lippman & Melonie Rasmussen
- Publisher: Pierce College
- Source: [LibreTexts](https://math.libretexts.org/Bookshelves/Precalculus/Book%3A_Precalculus__An_Investigation_of_Functions_(Lippman_and_Rasmussen))
- Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
- Read at LibreTexts: https://math.libretexts.org/Bookshelves/Precalculus/Book%3A_Precalculus__An_Investigation_of_Functions_(Lippman_and_Rasmussen)
- PDF: https://downloads.libretexts.org/api/v1/download/math-13825/pdf

Precalculus: An Investigation of Functions is a free, open textbook covering a two-quarter pre-calculus sequence including trigonometry.