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:<math>
\begin{align}
&\int_0^{2\pi} \text{ce}_n \text{ce}_m \,dx = \int_0^{2\pi} \text{se}_n \text{se}_m \, dx = \delta_{nm} \pi \\
&\int_0^{2\pi} \text{ce}_n \text{se}_m \,dx = 0
\end{align}
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Line 223:
:<math>
\begin{align}
&\int_0^{2\pi} \text{ce}_n \text{ce}_m \,dx = \int_0^{2\pi} \text{se}_n \text{se}_m \, dx = \delta_{nm} \pi \\
&\int_0^{2\pi} \text{ce}_n \text{se}_m \,dx = 0
\end{align}
| |||