% Samples for institute day
clc
format compact
A = [1 2 3; 3 0 1; 4 5 6]
det(A)
inv(A)
A^2
n=[1:20]
format long g
x=1./2.^(n);
y1=sin(x)./x;
y2=(1-cos(x))./x.^2;
[x;y1;y2]'
x1=linspace(-2,2);
y3=x1.^2;
plot(x1,y3,[1],[1],'o',[0 2],[-1 3])