Bohannan - Plane trigonometry - New paperback or softback - 22 - X555z

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

Hall - Elementary Trigonometry - New paperback or softback - 13 - X555z

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

Hobson - A Treatise on Plane Trigonometry - New paperback or softback - X555z

Lock - A Treatise On Higher Trigonometry - New paperback or softback - - X555z

Smith - A Key to Elementary Trigonometry - New paperback or softback - - X555z

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