Pre-Calculus in 2020

Must Know High School Pre-Calculus by Monahan, Christopher

Additional Mathematics by Frempong, George N.

The Mathematics of Virus Spread For Beginners: - An Introductory Work For The General Public by Truesdell, Jerald Duane

Calculus for the Curious by Osband, Kent

Precalculus by Openstax, Deguzman, Sandra, Halsey, Johanna

High School Math Made Understandable Book 3: Math 9, 10, 11, and 12 by Martin, Jeremy

Core Mathematics for WASSCE by Frempong, George N.

COLLEGE ALGEBRA, Vol. 2: Equations, Systems, Inequalities, Complex numbers, Polynomials, Progressions by Kanoussis, Demetrios P.

Trigonometry: A Combination of Algebra and Geometry by Gerth, Joseph