先画个图像,确定根的范围在[0,2]
clc
clear
a=0;
b=2;
f=@(x) log(x)-cos(x+pi/8);
Tol=1e-12;
while (b-a)>Tol
c=(a+b)/2;
if f(c)>0
b=c;
elseif f(c)