Das, B. C. <br/><br/>
Higher trigonometry 
B. C. Das and B. N. Mukherjee 
 - Calcutta  U. N. Dhur and Sons 
 - 272p. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>516.24  / D229