Lös ut x (complex solution)
\left\{\begin{matrix}\\x=\frac{\pi i}{\ln(-\sqrt{1-y^{2}}+iy)+2i\pi n_{2}}\text{, }n_{2}\in \mathrm{Z}\text{, }&\text{unconditionally}\\x=\frac{\pi i}{\ln(\sqrt{1-y^{2}}+iy)+2i\pi n_{1}}\text{, }n_{1}\in \mathrm{Z}\text{, }n_{1}\neq \frac{i\ln(\sqrt{1-y^{2}}+iy)}{2\pi }\text{, }&y\neq 0\end{matrix}\right,
Lös ut y
y=\sin(\frac{\pi }{x})
x\neq 0
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