Dipole Moment for Nonpolar Compounds

[Jared Faith 4E]

For Nonpolar compounds such as CO2, do we need to draw both dipole moment arrows to the partial negative charges even though they cancel eachother? Is there another way to show they cancel out?

[Chem_Mod]

Since the compound is linear, you could just write that the the O=C bonds will have identical dipoles in opposite directions which will therefore cancel each other out and result in no net dipole.