Trigonometry :  worktext / 
Ubaldo P. Mangune Jr.  [and others]. 
 - Plaridel, Bulacan :  St. Andrew Publishing House,  c2012. 
 - 171pages ;  25cm. 
<br/><br/> Includes bibliographical references (p.171) 
<br/><br/><label>ISBN: </label>9789710141432 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.