I-solve ang s
\left\{\begin{matrix}s=-\arccos(\frac{\sin(2t)e^{t}}{2})+2\pi n_{3}\text{, }n_{3}\in \mathrm{Z}\text{; }s=\arccos(\frac{\sin(2t)e^{t}}{2})+2\pi n_{4}\text{, }n_{4}\in \mathrm{Z}\text{, }&\nexists n_{1}\in \mathrm{Z}\text{ : }t=\frac{\pi \left(2n_{1}+1\right)}{2}\text{ and }\frac{|\sin(2t)|e^{t}}{2}\leq 1\\s\in \mathrm{R}\text{, }&\exists n_{2}\in \mathrm{Z}\text{ : }t=\pi n_{2}\end{matrix}\right.
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