Trigonometry / 
Pilar B. Acorda [and others]. 
 - Plaridel, Bulacan :  TCS Publishing House,  c2010. 
 - 269 pages :  Illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>9789710472697 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.