Downing, Douglas <br/><br/>
Barron’s E-Z Trigonometry 
By Douglas Downing 
 -  Barron’s Educational Series, Inc.  2010 
 - vii, 352 pages, 25 cm. 
<br/><br/> includes appendix & index 
<br/><br/><label>ISBN: </label>978-0-7641-4251-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>516.24 D75 2010