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Cis

Revision as of 12:04, 22 June 2006 by Chess64 (talk | contribs)
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Cis notation is a polar notation for complex numbers. For all complex numbers $z$, we can write $z=\mathrm{cis }(\theta)=\cos \theta + i\sin \theta$. Notice that $\mathrm{cis}$ is made up by the first letter of $\cos$, $i$, and the first letter of $\sin$.

See also

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