设y是x的函数,[sec(x+y)]^2=0两边对x求导数等于_数学解答

设y是x的函数,[sec(x+y)]^2=0两边对x求导数等于

人气：251 ℃　时间：2019-08-20 21:22:07

解答

很高兴为您
[sec(x+y)]^2=0两边对x求导数为
2sec(x+y)sec(x+y)tan(x+y)(1+dy\dx)=0
即为2[sec(x+y)]^2tan(x+y)(1+dy\dx)=0
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