A GRAPHICAL approach to precalculus with limits  a unit circle approach 
John Hornsby ...[et.al]., 
 - 4th.ed 
 - Boston  Addison-Wesley  c2007 
 - xix,[1050]p.:  ill.;  24cm 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0321356969 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DKA, DSB, DUT, KKA, DEM, DKP<br/>Functions