Lial, Margaret L. <br/><br/>
Trigonometry / 
Margaret L. Lial, E. John Hornsby, Jr., david I. Schneider. 
 - 6th ed. 
 - Marikina City :  Academe Pub. House,  c1996. 
 - xxiv, 422 p. : ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0321043626 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.