Das,B.C. <br/><br/>
HIGHER TRIGONOMETRY  
by B.C.Das and B.N. Mukherjee  
 - 36th ed  
 - Kolkata   Dr. Purnendu Dhar  2017  
 - 312p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516  / DAS