I have tried everything I can think of but cannot figure out how to phase a sine wave so that I see 3 plots of

f(x)=sin(x)

as a set of {0°, 120°, 240°} together on the same plot...

I am trying to determine the mesh current method using a circuit that I have constructed using OrCad the similator has the correct voltages and currents but I am having difficulty with Maple getting the 2 matrixs to come out properly. The method is called the cramer method. I am using it in conjunction with a 2 voltage source circuit.... Matrix one is to be divided by Matrix 2

Matrix one is

40   -8   0

0     20   -6

-20   -6    10

__________

Matrix 2 is

I tried entering x² and got (1/2)·x²

not (1/2)·x² + Constant