Evaluate ∫tan(x)dx\int \tan(x) dx∫tan(x)dx.
−ln∣cos(x)∣+C-\ln|\cos(x)| + C−ln∣cos(x)∣+C
ln∣sin(x)∣+C\ln|\sin(x)| + Cln∣sin(x)∣+C
sec2(x)+C\sec^2(x) + Csec2(x)+C
ln∣sec(x)∣+C\ln|\sec(x)| + Cln∣sec(x)∣+C