# P. 525, Equation 11.44

The equation should be

${\displaystyle c_{n}={\frac {2}{L_{x}\left(e^{n\pi L_{y}/L_{x}}-e^{-n\pi L_{y}/L_{x}}\right)}}\int _{0}^{L-x}f(x)\sin {\frac {n\pi x}{L_{x}}}dx.}$