Swokowski, Earl W. <br/><br/>
Precalculus :  functions and graphs / 
Earl W. Swokowski, Jeffery A. Cole. 
 - 8th ed. 
 - Albany, N. Y. :  Brooks/Cole Pub,  c1998. 
 - xxii, 793p. : col. ill. ; 23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534352634 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Functions.<br/>Algebra--Graphic methods.<br/>Trigonometry.