Trigonometry 
Fe N. Reyes...[et. al]. 
 -  National Book Store Inc.  1990 
 - 289 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71084864-X 
<br/><br/><label>Dewey Class. No.: </label>516.24 R33t  1990