求下列方程所确定的函数的导数ysinx-cos(x-y)=0

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 06:09:05
求下列方程所确定的函数的导数ysinx-cos(x-y)=0

求下列方程所确定的函数的导数ysinx-cos(x-y)=0
求下列方程所确定的函数的导数ysinx-cos(x-y)=0

求下列方程所确定的函数的导数ysinx-cos(x-y)=0
ysinx=cos(x-y)
同时求导数
y'sinx+ycosx=(x-y)'sin(y-x)
y'sinx+ycosx=(1-y')sin(y-x)
y'sinx+ycosx=sin(y-x)-y'sin(y-x)
y'sinx+y'sin(y-x)=sin(y-x)-ycosx
y'[sinx+sin(y-x)]=sin(y-x)-ycosx
y'=[sin(y-x)-ycosx]/[sinx+sin(y-x)]

对方程两边求导,得:
sinx*dy+y*cosx*dx+sin(x-y)*(dx-dy)=0
——》dy/dx=[ycosx+sin(x-y)]/[sin(x-y)-sinx]。