Aldous - Shrewsbury Trigonometry - New paperback or softback - X555z

Wilczynski - Plane Trigonometry and Applications - New paperback or so - X555z

Smith - Elementary Trigonometry - New paperback or softback - 75 - X555z

Graham Hall - Trigonometry - New paperback or softback - 46 - X555z

Rosenbach - Plane Trigonometry - New paperback or softback - 95 - X555z

Kumar - TRICKS OF TRIGONOMETRY - New paperback or softback - X555z

Hall - Elementary Trigonometry - New paperback or softback - 22 - X555z

Nunn - Teaching of Algebra Including Trigonometry - New paperback o - X555z