how to solve two equation with 2 variables

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Adham Ahmed
Adham Ahmed 2023-2-16
编辑： Matt J 2023-2-16
how to solve these two equations :
sin(x2) +2x2 =0
sin(x1-1)+2(x1-1)=0

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Matt J
Matt J 2023-2-16
编辑：Matt J 2023-2-16
Ran in:
You could use fsolve or fminsearch
fun=@(x) [sin(x(2))+2*x(2); sin(x(1)-1)+2*(x(1)-1)];
[x,fval]=fsolve(fun,[0;0])
Equation solved. fsolve completed because the vector of function values is near zero as measured by the value of the function tolerance, and the problem appears regular as measured by the gradient.
x = 2×1
1 0
fval = 2×1
0 0
[x,fval]=fminsearch(@(x) norm(fun(x)), [0,0])
x = 1×2
1.0000 -0.0000
fval = 9.4426e-05

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