Title: Trigonometry / Edition 11, Author: Margaret Lial
Title: Analytic Trigonometry with Applications / Edition 11, Author: Raymond A. Barnett
Title: Technical Mathematics with Calculus / Edition 6, Author: Paul A. Calter
Title: Precalculus: A Unit Circle Approach / Edition 3, Author: J. S. Ratti
Title: Algebra and Trigonometry / Edition 1, Author: Sheldon Axler
Title: Trigonometry / Edition 2, Author: Robert Blitzer
Title: Algebra and Trigonometry / Edition 6, Author: Robert Blitzer
Title: Algebra & Trigonometry / Edition 4, Author: Mustafa A Munem