matlab:dy/dx-x*sin(x+y)=0;y(1)=0

来源：学生作业帮助网编辑：六六作业网时间：2024/12/28 15:47:48

matlab:dy/dx-x*sin(x+y)=0;y(1)=0matlab:dy/dx-x*sin(x+y)=0;y(1)=0matlab:dy/dx-x*sin(x+y)=0;y(1)=0因为当你

matlab:dy/dx-x*sin(x+y)=0;y(1)=0
matlab:dy/dx-x*sin(x+y)=0;y(1)=0

matlab:dy/dx-x*sin(x+y)=0;y(1)=0
因为当你输入
dsolve('Dy=x*sin(x+y)','y(1)=0')时,注意,没有指明自变量,matlab默认自变量是t,因此x被看作了常数,此时y(1)=0可能是个有问题的初值,所以不行.这也就是楼上的结果为什么会出现t的原因.
本题正
>> syms x y;
>> dsolve('Dy=x*sin(x+y)','x')
Warning: Explicit solution could not be found.
> In dsolve at 330

ans =

[ empty sym ]
说明matlab解不出来,变一下形.
令z=x+y,则dy/dx=dz/dx-1,原方程化为dz/dx-1-xsinz=0, z(1)=1
>> dsolve('Dz=x*sinz+1','z(1)=1','x')

ans =

1/2*x^2*sinz+x-1/2*sinz
然后将z换回x+y就行了.

syms x y;
dsolve('Dy=x*sin(x+y)','y(1)=0')
ans=
2*atan(exp(log(tan(x/2)) - x + t*x)) - x你的是怎么解出来的；为什么我的出现： ??? Error using ==> dsolve Error, (in dsolve/IC) The 'implicit' option is not a...

全部展开

syms x y;
dsolve('Dy=x*sin(x+y)','y(1)=0')
ans=
2*atan(exp(log(tan(x/2)) - x + t*x)) - x

收起

matlab:能用matlab将 dy/dx=x*sin(x+y) matlab:dy/dx-x*sin(x+y)=0;y(1)=0 d{cos(x-y)=sin(x-y)(dx-dy)这里dx-dy是什么意思呢? x=sin(y/x)+e^2 求dy/dx y=[sin(x^4)]^2,则dy/dx=?,dy^2/dx^2=?,dy/d(x^2)=? dy/dx=y/(sin(y)-x) 的积分设sin(x+y)=xy,求dy/dx. 求通解dy/dx=sin(x-y) 已知sin(xy)=x^2,求 dy/dx= y=sin(x^2),dy/dx=? (dy/dx)sin x=yln y的通解 y = sin²（x²）求 dy / dx 用MATLAB求解微分方程dy/dx-2y/(x+1)=(x+1)^5/2 matlab 解微分方程组 dx/dt=x+y dy/dt=x-y matlab已知arctan(x/y)=log(x^2+y^2),求dx/dy dy/dx=x+y 函数y=f(sin^2(x)),f'(X)=g(x),则dy/dx=? 求微分方程x*dy/dx+x+sin(x+y)=0的通解