# Math Help - using spherical polar coordinates

1. ## using spherical polar coordinates

If $\underline{A} = f(r)\underline{r}$ , use spherical polar coordinates to find $f(r)$ if

(i) $\underline{\nabla} \cdot \underline{A} = 0$ and

(ii) $\underline{\nabla} \times \underline{A} = 0$

Not sure how to do the above I think I manged to find

$f(r) = \frac{C}{r^3}$ , but I don't know what to do next...

2. The second condition is superfluous.

3. Originally Posted by Rebesques
The second condition is superfluous.
yeah thanks I see now