System gyfesurynnau: Gwahaniaeth rhwng fersiynau
Cynnwys wedi'i ddileu Cynnwys wedi'i ychwanegu
Ychwanegu tabl |
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Llinell 162:
=== Rhwng systemau gwahanol ===
Dengys y tabl y berthynas rhwng systemau petryalog a systemau pegynol.
<br />
{| class="wikitable"
|-
! System !! Petryalog !! Pegynol
|-
| Pegynol
||
<math>
\begin{array}{lcl}
x & = & r \cos \theta \\
y & = & r \sin \theta
\end{array}
</math>
||
<math>
\begin{array}{lcl}
r & = & \sqrt {x^2 + y^2} \\
\theta & = & \arctan \tfrac {y}{x}
\end{array}
</math>
|-
| Silindraidd
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<math>
\begin{array}{lcl}
x & = & r \cos \theta \\
y & = & r \sin \theta \\
z & = & z
\end{array}
</math>
||
<math>
\begin{array}{lcl}
r & = & \sqrt {x^2 + y^2} \\
\theta & = & \arctan \tfrac {y}{x} \\
z & = & z
\end{array}
</math>
|-
| Sfferigol
||
<math>
\begin{array}{lcl}
x & = & r \cos \theta \sin \phi \\
y & = & r \sin \theta \sin \phi \\
z & = & r \cos \phi
\end{array}
</math>
||
<math>
\begin{array}{lcl}
r & = & \sqrt {x^2 + y^2 + z^2} \\
\theta & = & \arctan \tfrac {y}{x} \\
\phi & = & \arctan \tfrac {z}{r}
\end{array}
</math>
|}
== Cyfesurynnau ar fap ==
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