Question

求大神解答速度

Answer 1

e^x*sin y-e^(-y)*cos x=0 求导有：
e^x(siny+y'cosy)- e^(-y)*(-y'cos x-sinx)=0
e^x*y'cosy+e^(-y)*y'cos x+ e^(-y)*sinx+e^x*siny =0
y'=-(e^(-y)*sinx+e^x*siny)/(e^x*cosy+e^(-y)*cos x)

追问

再不！