UC知道如何用Matlab画隐函数（带参数）的方程
来源：百度知道 编辑：UC知道 时间：2024/05/10 08:13:01
两个约束方程:
2*(sin(x))^2*cos(x)-cos(x)+cos(x0)-sin(x0)=0
y=(sin(x)-cos(x)-sin(x0)+cos(x0))*(1+ctan(x0))
要画x0与y之间的曲线关系图。
没有什么太好的办法。
【1】解第一个方程，用1-(cos(x))^2=(sin(x))^2
>> x=solve('2*(1-(cos(x))^2)*cos(x)-cos(x)+cos(x0)-sin(x0)=0','x')
x =
[ acos(1/6*(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3)+1/(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3))]
[ acos(-1/12*(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3)-1/2/(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3)+1/2*i*3^(1/2)*(1/6*(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3)-1/(54*cos(x0)-54*sin(x0)+6*(-6+81*cos(x0)^2-162*cos(x0)*sin(x0)+81*sin(x0)^2)^(1/2))^(1/3)))]
[ acos(-1/12*(54*cos