设y=In(sec X+tan X ),求y'_数学解答

设y=In(sec X+tan X ),求y'

人气：175 ℃　时间：2020-03-20 10:41:31

解答

=(sec X+tan X )'/(sec X+tan X )
=(secxtanx+sec² x)/(sec X+tan X )
=secx(tanx+sec x)/(sec X+tan X )
=secx