TY  - BOOK
AU  - Aggarwal, R.S.
AU  - Aggarwal, Deepak
TI  - Objective mathematics for engineering entrance examinations: trigonometry / 
SN  - 9788121933544
U1  - 510 
PY  - 2010///
CY  - New Delhi
PB  - S.Chand 
ER  -