Trigonometry / 
Fe N. Reyes ... =et al.=. 
 - 2nd ed. 
 - Mandaluyong City :  National Book Store,  c2000. 
 - 394 p. : ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9710861328 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.