Das, B. C. and Mukherjee, B. N. <br/><br/>
Higher trigonometry 

 - 18th ed. 
 - Calcutta  ; U. N. Dhur And Sons 
 - xvi,272p. 
<br/><br/><label>ISBN: </label> 11 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.24  / DAS