Trigonometry 
Holder, Leonard, I. 
 -  Wadsworth Publishing Company.  1982 
 - 271 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-534-01014-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>516.24 H71t 1982