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This discussion highlights three open-source mathematics textbooks: "College Trigonometry 3rd Corrected Edition" by Stitz Zeager, "Precalculus 3rd, Corrected Edition" by Lakeland Community College and Lorain County Community College, and "A First Course in Linear Algebra" by Robert A. Beezer. The copyright situation for these resources has been verified and approved. Additionally, a user notes that the navigation buttons for the online versions are subpar.
PREREQUISITESStudents, educators, and mathematics enthusiasts seeking accessible and verified open-source textbooks for college-level mathematics and trigonometry courses.