Precalculus (OpenStax) – LibreTexts (CC BY)
Category: MATH 155
Algebra and Trigonometry (OpenStax) – LibreTexts (CC BY)
Precalculus: An Investigation of Functions (Includes Trig) 2nd Ed (Lippman, Rasmussen) – LibreTexts
Algebra and Trigonometry (OpenStax) – LibreTexts (CC BY)
Precalculus: An Investigation of Functions (Includes Trig) 2nd Ed (Lippman, Rasmussen) – LibreTexts