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>971-08-6132-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.