Lial, Margaret L. <br/><br/>
Trigonometry / 
Margaret L. Lial, E. John Hornsby Jr., David I. Schneider. 
 - 6th ed. 
 - Reading, Mass. :  Addison-Wesley,  c1997. 
 - xxiv, 422p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>0673995534 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.