Das, B. C. <br/><br/>
Higher Trigonometry / 
B. C. Das, N. Mukherjee 
 - Kolkata :  U. N. Dhur & sons Private Ltd.  2011. 
 - 312 p. :  ills;  18 cm. 
<br/><br/><label>ISBN: </label>8185624690 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>512.242  / DAS 2011