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=== Teascóg ===
Bíonn méid gach teascóige i gcomhréir le méid na huillinne gafa inti.
=== Cothromóidí ===
1. Cairtéiseach
:<math>x^2 + y^2 = r^2\!\ </math>
2. Pólar
:<math>x = r\,\cos t,\,</math>
:<math>y = r\,\sin t\,</math>
3. Coimpléascach
:<math>z = \cos \phi + i \sin \phi\!\ = e^{i \phi}</math>
Ní mór dúinn a rá go bhfuil
:<math>z = \cos \pi + i \sin \pi\!\ = e^{i \pi}</math>
:<math>z = -1 + 0 = e^{i \pi}</math>
:<math>e^{i \pi} + 1 = 0</math>
[[Íomhá:Euler's formula.svg|thumb|Ciorcal]]
Féach ar leathanach "Euler's formula"
<ref>[http://en.wikipedia.org/wiki/Euler's_formula Euler's formula] dáta den rochtain is déanaí: 2012/09/29</ref>
as Béarla.
== Tagairtí ==
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