Demana, Franklin D. <br/><br/>
Precalculus. 

 - 7th ed. 
 - USA.  Pearson Education.  2010. 
 - 1032p. 
<br/><br/><label>ISBN: </label>0131359622 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Algebra--Textbook. 2. Trygonometry--Textbooks
<br/><br/><label>LC Class. No.: </label>QA 154.3 .P74 2009