Ortiz, Luz D. <br/><br/>
Trigonometry/ 
Luz D. Ortiz 
 - Marikina City :   ICS Publishing, Inc.,   c2002. 
 - 210 p. ;   25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>971-719-171-9. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Trigonometry-Textbooks.
<br/><br/><label>Dewey Class. No.: </label>Fil. 516.24 Or78 2002