\[\int_{{}}^{{}}{\frac{dx}{{{\sin }^{2}}x{{\cos }^{2}}x}=}\] [Roorkee 1976; RPET 1991]

\[\int_{{}}^{{}}{\frac{dx}{{{\sin }^{2}}x{{\cos }^{2}}x}=}\] [Roorke

1.	\[\int_{{}}^{{}}{\frac{dx}{{{\sin }^{2}}x{{\cos }^{2}}x}=}\] [Roorkee 1976; RPET 1991]
A.	\[\tan x+\cot x+c\]
B.	\[\cot x-\tan x+c\]
C.	\[\tan x-\cot x+c\]
D.	None of these
Answer» D. None of these