Trigonometry (worktext)/ 
Rodolfo G. Tungcab [and 5 others] 
 - Manila:  Grandbooks Publishing, Inc.,  c2013. 
 - v, 105 pages;  26 cm. 
<br/><br/> Includes bibliographical references and glossary. 
<br/><br/><label>ISBN: </label>978-971-725-151-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>DFil 516.24  / T73