I-solve ang x
\left\{\begin{matrix}\\x=\pi n_{1}+\frac{\pi }{2}\text{, }n_{1}\in \mathrm{Z}\text{, }&\text{unconditionally}\\x\neq \pi n_{2}\text{, }\forall n_{2}\in \mathrm{Z}\text{, }&\exists n_{1}\in \mathrm{Z}\text{ : }y=\pi n_{1}+\frac{\pi }{2}\end{matrix}\right.
I-solve ang y
\left\{\begin{matrix}y=\pi n_{2}+\frac{\pi }{2}\text{, }n_{2}\in \mathrm{Z}\text{, }&\nexists n_{1}\in \mathrm{Z}\text{ : }x=\pi n_{1}\\y\in \mathrm{R}\text{, }&\exists n_{2}\in \mathrm{Z}\text{ : }x=\pi n_{2}+\frac{\pi }{2}\end{matrix}\right.
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