Swokowski, Earl W. <br/><br/>
Precalculus :  functions and graphs / 
Earl W. Swokowski. 
 - 6th ed. 
 - Boston :  PWS-Kent,  1990. 
 - xvi, 599, [77] p.  :  col. ill.  ;  24 cm. 
 - The Prindle, Weber & Schmidt series in mathematics. .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534920861 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Functions.<br/>Algebra--Graphic methods.<br/>Trigonometry.