Lial, Margaret L. <br/><br/>
Trigonometry 
Margaret L. Lial, E. John Hornsby, David I. Schneider, Author 
 - Sixth Edition 
 - Reading, Massachusetts:  Addison-Wesley,  1996 
 - xxiv, 422 pages;  24 cm. 
<br/><br/><label>ISBN: </label>0673995534 
<br/><br/><label>LC Class. No.: </label>QA531  / L5 1996