Ebatzi: x (complex solution)
x=2\pi n_{2}+\frac{2\pi }{3}\text{, }n_{2}\in \mathrm{Z}
x=2\pi n_{3}+\frac{4\pi }{3}\text{, }n_{3}\in \mathrm{Z}
x=\pi n_{1}+\frac{\pi }{2}\text{, }n_{1}\in \mathrm{Z}
Ebatzi: x
x=2\pi n_{1}+\frac{4\pi }{3}\text{, }n_{1}\in \mathrm{Z}
x=\pi n_{2}+\frac{\pi }{2}\text{, }n_{2}\in \mathrm{Z}
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