Downing, Douglas. <br/><br/>
Barron's E-Z trigonometry / 
 E-Z trigonometry 
Douglas Downing. 
 - [4th ed.] 
 - Hauppauge, N.Y. :  Barron's Educational series,  c2010. 
 - vii, 352 p. :  ill. ;  26 cm. 
 - E-Z .
<br/><br/> Rev. ed. of: Trigonometry, the easy way. 3rd. ed. 2001. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780764142512 (pbk.) 0764142518 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>516.24  / DOW 2010