非線形連立方程式の解法

0.05*cos(theta21) + 0.04*cos(theta22) = 0.07;

0.05*sin(theta21) + 0.04*sin(theta22) = 0.01235;

からtheta21,theta22を解きたいのですが、どのようにmファイルに記述すればよろしいでしょうか？

Answer 1

[Hernia Baby]

fsolveを参考にしてみてください。

以下は上記関数の一例になります。

fun = @root2d;
x0 = [0,0];
x = fsolve(fun,x0)

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 = 1×2

0.3532 0.6061

function F = root2d(x)
F(1) = exp(-exp(-(x(1)+x(2)))) - x(2)*(1+x(1)^2);
F(2) = x(1)*cos(x(2)) + x(2)*sin(x(1)) - 0.5;
end