DLMF:23.11#Ex2
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Math Formula Information
Formula: Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle f_{2}(s,\tau)=\frac{\cos^{2}@{\tfrac{1}{2}s}}{1-2e^{i\tau s}\cos@@{s}+e^{2i\tau s}}.}
Name: DLMF:23.11#Ex2
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q7320