Which expression represents the indefinite integral of the function f(x)=sec(x)tan(x)f(x) = \sec(x)\tan(x)f(x)=sec(x)tan(x)?
sec(x)+C\sec(x) + Csec(x)+C
tan(x)+C\tan(x) + Ctan(x)+C
csc(x)+C\csc(x) + Ccsc(x)+C
sec2(x)+C\sec^2(x) + Csec2(x)+C