 Plane Trigonometry by E. Richard Heineman, J. Dalton Tarwater, 19930101
 Precalculus with Trigonometry: Concepts and Applications, Solutions Manual by Paul Foerster, 20060531
 Plane and Spherical Trigonometry (Classic Reprint) by George N. Bauer, 20100920
 Precalculus: With Unit Circle Trigonometry (with CDROM and iLrn? Tutorial) by David Cohen, 20050321
 Graphical Approach to Algebra and Trigonometry, A (5th Edition) (Hornsby/Lial/Rockswold Graphical Approach Series) by John Hornsby, Margaret L. Lial, et all 20100206
 Algebra & Trigonometry Enhanced with Graphing Utilities (2nd Edition) by Michael Sullivan, Michael J Sullivan, 19991006
 Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (2nd Edition) (Sullivan Concepts Through Functions Series) by Michael Sullivan, Michael Sullivan III, 20100226
 Trigonometry the Easy Way by Douglas Downing Ph.D., 20010201
 Trigonometry (2nd Edition) by Judith A. Beecher, Judith A. Penna, et all 20071020
 Trigonometry: A Unit Circle Approach (8th Edition) by Michael Sullivan, 20070518
 Schaum's Outline Series : Theory and Problems of Plane and Spherical Trigonometry (including 680 problems solved in detail) by Frank Ayres jr, 195412
 Student Solutions Manual College Algebra with Trigonometry by Raymond Barnett, Michael Ziegler, et all 20100414
 Teach Yourself Trigonometry by P.Abbott, 20030728
 Algebra 2 With Trigonometry by Be Hall, 199306
