Gabuyo, Yonardo A. <br/><br/>
Plane trigonometry:   a modern approach 

 - Second edition 
 - Manila:  Rex Book Store;  2013. 
 - 324 pages,  25 cm. 
<br/><br/><label>ISBN: </label>9789712361326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>LC Class. No.: </label>FIL QA 531    / G33 2013