Derivative of the surface function considering the polar angle
\[\begin{split}\frac{\partial\Phi}{\partial\phi}(r,\phi,z)=
\begin{bmatrix}-r\sin(\phi)\\r\cos(\phi)\\0\end{bmatrix}\end{split}\]
with radius \(r\), polar angle \(\phi\) and cylinder length
\(z\).
Parameters: |
- r : float
Radius
- phi : float
Polar angle
- z : float
Distance ins z-axis
|
Returns: |
- pos : list
Cartesian coordinates for given polar coordinates
|