MATLAB: Plot as not expected

MATLABplot

Hello
Can anybody please help me?
I am trying to plot 3 functions. I expect to see sine periodic in negative x and exponential in positive x, but matlab ignores cos.
here is my code:
t = -10:0.01:10;
A=-0.6*(cos(t)+2.*sin(t))+((-0.5+0.6)*exp(2*t));
B=-0.6*(cos(t)+2.*sin(t))+((-0.6+0.6)*exp(2*t));
C=-0.6.*(cos(t)+2.*sin(t))+((-0.7+0.6).*exp(2.*t));
plot(t, A)
hold on
plot(t, B)
plot(t, C)
grid on
Thank you
Kindest regards
Here is what I expect to see

Best Answer

None of them are being ignored. The current y-axis limits are so large that the red line ‘C’ appears as a straight line.
Use: 
ylim ([-1 1]*20)
to see all of them clearly. The complete code is then: 
t = -10:0.01:10;
A=-0.6*(cos(t)+2.*sin(t))+((-0.5+0.6)*exp(2*t));
B=-0.6*(cos(t)+2.*sin(t))+((-0.6+0.6)*exp(2*t));
C=-0.6.*(cos(t)+2.*sin(t))+((-0.7+0.6).*exp(2.*t));
figure
plot(t, A)
hold on
plot(t, B)
plot(t, C)
grid on
ylim ([-1 1]*20)
producing:
.
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