Narayanan, S. <br/><br/>
Trigonometry 

 - Chennai  S.Viswanathan printers &Publishers PVT. LTD.  2007 
 - v,195p.  PB  22cm. 
<br/><br/><label>ISBN: </label>8187156163 
<br/><br/><label>Dewey Class. No.: </label>516.24  / NAR