Smith, Karl J. <br/><br/>
Essentials of trigonometry / 
Karl J. Smith 
 - 4th ed. 
 - Belmont, CA :  Thomson Brooks/Cole,  c2006 
 - xii, 495, 13 p. :  ill. ;  25 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0495109371 0534494234 (student ed.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Textbooks