Larson, Ron. , <br/><br/>
Trigonometry / 
Ron Larson, Robert P. Hostetler ; with the assistance of David E. Heyd. 
 - 6th ed. 
 - xxv, 509 pages :  illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>0618317953 
<br/><br/><label>LC Class. No.: </label>QA531   / .L37 2004