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**Help with curls and current density!1**

## Homework Statement

In cylindrical coordinates, J = 10

^{5}*(cos(2r)

^{2})*a

_{z}in a certain region. Obtain H from this current density and then take the curl of H and compare with J.

Answer H = 10

^{5}*(r/4+sin4r/8+cos4r/32r-1/32r)a

_{phi}

## Homework Equations

J = Del Operator X H

## The Attempt at a Solution

Well I know I will be working backwards here. I am given the current density and they want H. However can anyone provide hints for me for the inverse of the del operator. Am I just going ot take the integral of everything as opposed to the partial derivative.??

Thanks