Trigonometry / John Coburn, J.D. Herdlick. Coburn, John W. Herdlick, John D. Trigonometry Textbooks. QA531 .C63 2011 516.24 22 COT Includes index. Dubuque, IA : McGraw-Hill, c2011. c2011. 2011 Text xxxiv, 452 p. eng The Coburn/Herdlick trigonometry series