Chavez, Divinia Creus G. A syllabus-based worktext in plane trigonometry / Divina G. Creus - Chavez. - Malabon City : Jimczyville Publications, c2012. - iv, 150 pages : 25 cm ISBN: 9789710508877 Subjects--Topical Terms: Plane trigonometry LC Class. No.: QA533 / C39 2012