t=26:.01:30;
f=.5;
w=f*2*pi
phi1=-.2;
phi2=pi/3;
A1=1.25
A2=1.83

s1=A1*sin(w.*t-phi1);
s2=A2*sin(w.*t-phi2);

plot(t,s1,'k-',t,s2,'k-');
xlabel('time, sec')
ylabel('Amplitude');
grid;
print 'phase' -dill 