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CK-12’s Trigonometry Concepts is an introduction to trigonometry for the high school student. Topics include: Trigonometric Identities & Equations, Circular Functions, and Polar Equations & Complex Nu ...
CK-12 Foundation’s Trigonometry FlexBook® textbook is an introduction to trigonometry for the high school student. Topics include: Trigonometric Identities & Equations, Circular Functions, and Polar E ...