Ebatzi: θ (complex solution)
\theta =2\pi n_{1}+\frac{\pi }{4}\text{, }n_{1}\in \mathrm{Z}
\theta =2\pi n_{1}+\frac{7\pi }{4}\text{, }n_{1}\in \mathrm{Z}
Ebatzi: θ
\theta =2\pi n_{1}+\frac{\pi }{4}\text{, }n_{1}\in \mathrm{Z}
\theta =2\pi n_{2}+\frac{7\pi }{4}\text{, }n_{2}\in \mathrm{Z}
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