Das, B.C.  <br/><br/>
Higher trigonometry 

 - 36 rev. ed. 
 - Kolkata  U.N. Dhur and Sons  2017 
 - xxi, 312p.  18x12cm. 
<br/><br/><label>ISBN: </label>9789380673837  150 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.24  / DAS/HIG