Jarvis323
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How can I convert this system of equations :
$$\frac{dz}{d\phi} = \frac{rB_z}{B_{\phi}},
\frac{dr}{d\phi} = \frac{rB_r}{B_{\phi}},
\frac{d\phi}{d\phi} = 1$$
to
$$\frac{dr}{dz},
\frac{d\phi}{dz},
\frac{dz}{dz}$$
$$\frac{dz}{d\phi} = \frac{rB_z}{B_{\phi}},
\frac{dr}{d\phi} = \frac{rB_r}{B_{\phi}},
\frac{d\phi}{d\phi} = 1$$
to
$$\frac{dr}{dz},
\frac{d\phi}{dz},
\frac{dz}{dz}$$