Trigonometry in 2011

Algebra and Trigonometry with Analytic Geometry by Swokowski, Earl W., Cole, Jeffery A.

Student's Choice Regents Review Algebra 2/Trigonometry by Gu, Henry

Algebra Examples Trigonometry by Kim, Seong R.

Algebra Examples Trigonometry 1 by Kim, Seong R.

Algebra Examples Trigonometry 2 by Kim, Seong R.

Algebra Examples Trigonometry 3 by Kim, Seong R.

Plane Trigonometry by Mahadevan, Chandramouli

Mathematical Olympiad Treasures by Andreescu, Titu, Enescu, Bogdan

Elements of Geometry by Playfair, John, Wallace, William, Davidsons, John