# Convert 3d cartesian to polar

1. Apr 20, 2009

### -EquinoX-

1. The problem statement, all variables and given/known data

I need to convert this to a polar coordinate
$$\vec{F} = 5xz\vec{i} + 5yz\vec{j} + 4z^3\vec{k}$$

2. Relevant equations

3. The attempt at a solution

I have no idea to do this, can someone help?

2. Apr 20, 2009

### dx

First, you have to write the equations that express x, y and z in terms of θ, φ and r. Then you write i, j and k in terms of the unit vectors $e_\theta, e_\phi$ and $e_r$. Then you just substitute.

3. Apr 20, 2009

### -EquinoX-

is the forum having problem with latex?