5 tan' x sec' x da = O sec14 x - 2 sec10 x + 5 sec6 x + C O 'sec x - 2 sec5 x + 2sec3 x + C O = sec' atan'x - - sec' x tan' x + C O "tan x + tan' x + C O sec x - - sec3 x + 5 sec x + C O Stanx + 2 tan x + C