Deauna, Melecio C.  <br/><br/>
Basic trigonometry for secondary schools / 
Melecio C. Deauna, Florita C. Lamayo 
 - ix, 347 p.;  25 cm.  
<br/><br/> Includes bibliographical references and index. 
<br/><br/>  
<br/><br/><label>ISBN: </label>9717910391 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>516.24 D349