What is the Volume Charge Density in the Region with Given Electric Field?

[Crazy Gnome]

Homework Statement

An electric field in the region r>a is given by E_r=2ACos($$\vartheta$$)/r³, E_{$$\vartheta$$}=Asin($$\vartheta$$)/r³, E_$$\psi$$=0 where A= constant. Find the Volume charge density in the region.

There is not picture.

I am really lost on this one.

 

[Defennder]

From what I can read, it seems like you gave the E field in spherical basis vectors. But the method involved doesn't depend on any coordinate basis. Just ask yourself what is another interpretation for div(D).