Gabuyo, Yonardo A <br/><br/>
Plane trigonometry :  a modern approach / 
Yonardo A. gabuyo, Leila D. P. Mejis. 
 - 2nd ed. 
 - Manila :  Rex Book Store,  c2011. 
 - ix, 324 p. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9789712361326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry, Plane.<br/>Trigonometry Problems, exercises, etc. 
<br/><br/><label>LC Class. No.: </label>QA533  / .G32 2011