Datta, Ushri. <br/><br/>
Algebra and trigonometry. 

 - New Delhi.  Prentice- Hall of India Pvt.  Ltd        2006 
 - x, 341 p. 
<br/><br/><label>ISBN: </label>8120329740 
<br/><br/><label>Dewey Class. No.: </label>512