What is ∫sec2x dx\displaystyle\int \sec^2 x\, dx∫sec2xdx?
tanx+C\tan x + Ctanx+C
secxtanx+C\sec x \tan x + Csecxtanx+C
2secx+C2\sec x + C2secx+C
−cotx+C-\cot x + C−cotx+C