Precalculus / 
Larson,Roland E. 
 - 4th ed. 
 - Boston :  Houghton Mifflin Co.  c1997 
 - xxvi,878pages :  ill.som.col. ;  24cm. 
<br/><br/><label>ISBN: </label>0 669 41742 4 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515 HOS