Originally Posted by

**braddy** Hi I have problem finding the solution for this problem:

*Find the divergence of the vector function A=***ˆρ** ρ

transform this vector function into rectangular coordinates and find the

divergence using rectangular coordinates calculation.

I know that I need to find 2 since I have computed it in cylindar coordinates.

But I don't succeed to do it in rectangular coordinates.

I replace **ρ by sqrt(x^2+y^2+z^2)** (where in this case z=0)and

the unit vector ˆρ by **ˆx***cos(phi)+ **ˆy***sin(phi)

__N.B: In bold this is the unit vector.__

thank you.

B