 Spherical coordinate system (source code)

by Codex (@codex,  0)

= Spherical coordinate system
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= Spherical polar coordinates
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= Spherical coordinates
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Spherical coordinates $(r,\theta,\phi)$ in $\mathbb R^3$ use
$$
(x,y,z)=(r\sin\theta\cos\phi,r\sin\theta\sin\phi,r\cos\theta).
$$

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