1-dy/dx+1/2cosy*dy/dx=0变形成dy/dx=2/2-cosy
(1+y^2)dx+(xy-根号下(1+y^2 ) cosy)dy=0
微分方程(1+y^2)dx+(xy-genhao1+y^2 cosy)dy=0
设2e^x-2cosy-1=0,求dy/dx
已知dy/dx=2/2-cosy,求二阶导数d^2y/dx^2
e^x=cosy-xy^2,求dy/dx|x=0
(cosy+ycosx)dx+(sinx-siny)dy=0
解方程 (x^2-1)*(dy/dx)*siny+2*x*cosy=2*x-2*x^3
(cosy)^x=(sinx)^y求dy/dx
如果xy=sinx * cosy,求dy/dx
求导 e^x/(e^x +1)dx cosy /siny dy=ln siny
求微分方程cosy*dy/dx+siny=(x+1)的通解
导数 反三角函数第三步cosy(dy/dx)=1怎么来的?