Lial, Margaret L. <br/><br/>
Trigonometry / 
M.L. Lial & oth. 
 - 5th ed. 
 - New York :  HarperCollins College Publishers,  1993. 
 - 362, [A-1-A-34] p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0-673-46647-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry