@book{5745,
	author = {B.C Das ,B.N Mukherjee and B.C Das ,B.N Mukherjee},
	title = {Higher Trigonometry},
	publisher = {U. N. Dhur & sons Private Ltd.},
	year = {2010},
	address = {Kolkata},
	edition = {30th},
	note = {Includes Index .}
}