已知 y*sinx-cos(x-y)=0,求dy的值?
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已知y*sinx-cos(x-y)=0,求dy的值?已知y*sinx-cos(x-y)=0,求dy的值?已知y*sinx-cos(x-y)=0,求dy的值?因为y*sinx-cos(x-y)=0则：d
已知 y*sinx-cos(x-y)=0,求dy的值?
已知 y*sinx-cos(x-y)=0,求dy的值?
已知 y*sinx-cos(x-y)=0,求dy的值?
因为 y*sinx-cos(x-y)=0
则：d(ysinx)-dcos(x-y)=0
即：sinxdy+dcosxdx+sin(x-y)(dx-dy)=0
整理得：[sin(x-y)-sinx]dy=[ycosx+sin(x-y)]dx
所以：dy=[ycosx+sin(x-y)]dx/[sin(x-y)-sinx]
已知 y*sinx-cos(x-y)=0,求dy的值?
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