Drooyan, Lrving.  Hadel, Walter. <br/><br/>
Essentials of trigonometry  x 

 - 2nd 
 - N.Y.  Macmillan  1977 
 - viii, 328 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry Geometry 
<br/><br/><label>Dewey Class. No.: </label>516.24/DRE