dy/dx=-(2xcosy+y^2*cosx)/(2ysinx-x^2*siny)
dy/dx=-(2xcosy+y^2*cosx)/(2ysinx-x^2*siny)
证明(2xcosy+y^2*cosx)dx+(2ysinx-x^2*siny)dy 某个函数u(x,y)的全微分,并求出
解微分方程 (siny-ysinx)dx+(xcosy+cosx)dy=0
微分方程(siny+y^2sinx)dx+(xcosy-2ycosx)dy=0.求详解.
x-y+siny=2,求dy/dx
ysinx+cos(x-y)=0,求dy/dx|(x=π/2)
求y+siny-cosx=0,(dy/dx)|x=π/2 的隐函数y的导数
(2siny)dx+(2xcosy+1)dy是某个函数的全微分,求原函数
∫(x^2-y)dx+(x+siny)dy
计算曲线积分:∫(L)(2xy^3-y^2cosx)dx+(1-2ysinx+3x^2y^2)dy.其中L是
已知ysinx-cos(x+y)=0,求在点(0,π/2)的dy/dx值
求dy/dx=x/y+(cosx/y)^2通解