首先根据后面的方程 令 x = cos(theta) ,y = sin(theta),这样就简单多了,具体代码如下
[theta z] = fminbnd(@(theta) 5*(1-cos(theta)/3-sin(theta)/4),0,2*pi);
x = cos(theta);
y = sin(theta);
disp(['最近点的值 z = ',num2str(z),' 坐标(x,y) = (',num2str(x),',',num2str(y),')'])