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cosine_function [2014/01/29 19:51] nikolaj |
cosine_function [2014/01/29 19:51] nikolaj |
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| ^ $\cos(\theta) = \frac{1}{2}(\mathrm e^{i\theta}+\mathrm e^{-i\theta}) $ ^ | ^ $\cos(\theta) = \frac{1}{2}(\mathrm e^{i\theta}+\mathrm e^{-i\theta}) $ ^ | ||
| - | i.e. if $\zeta_\theta:=\mathrm e^{i\theta}$, then $\zeta_\theta+\overline{\zeta_\theta}=2\cos(\theta)$. | + | i.e. if $\zeta:=\mathrm e^{i\theta}$, then $\zeta+\overline{\zeta}=2\cos(\theta)$. |
| ==== Parents ==== | ==== Parents ==== | ||
| === Requirements === | === Requirements === | ||
