Stewart, James. <br/><br/>
Precalculus: mathematics for calculus. / 
James Stewart, L. Redlin and Saleem Watson. 
 - 4th ed. 
 - Ontario :  Thomson Nelson,  2003. 
 - 619 + various pagings :  ills. ;  24cm. 
<br/><br/>Contents: Trigonometric functions of real numbers -- Trigonometric functions of angels -- Analytic trigonometry.  
<br/><br/><label>ISBN: </label>0534434215 
<br/><br/><label>LC Class. No.: </label>QA39.3.S74