x=sin(y/x)+e^2 求dy/dx

问题描述:

x=sin(y/x)+e^2 求dy/dx
1个回答 分类:数学 2014-11-13

问题解答:

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x=sin(y/x)+e^2 求dy/dx
d(x)=d(sin(y/x)+e^2)
dx=dsin(y/x)+de^2
dx=cos(y/x)d(y/x)
dx=cos(y/x)(xdy-ydx)/x^2
x^2dx=xcos(y/x)dy-ycos(y/x)dx
x^2dx+ycos(y/x)dx=xcos(y/x)dy
dy/dx=(x^2+ycos(y/x))/xcos(y/x)
sin(y/x)=x-e^2
y/x=arcsin(x-e^2)
dy/dx=(x^2+ycos(arcsin(x-e^2)))/xcos(arcsin(x-e^2))
 
 
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