I-solve ang x (complex solution)
x=-\frac{i\ln(\frac{\sqrt{\left(y+2\right)\left(y+8\right)}+y+5}{3})}{2}+\pi n_{1}\text{, }n_{1}\in \mathrm{Z}
x=-\frac{i\ln(\frac{-\sqrt{\left(y+2\right)\left(y+8\right)}+y+5}{3})}{2}+\pi n_{2}\text{, }n_{2}\in \mathrm{Z}
I-solve ang x
x=\frac{\arccos(\frac{y+5}{3})+2\pi n_{1}}{2}\text{, }n_{1}\in \mathrm{Z}
x=\frac{-\arccos(\frac{y+5}{3})+2\pi n_{2}}{2}\text{, }n_{2}\in \mathrm{Z}\text{, }y\geq -8\text{ and }y\leq -2
I-solve ang y
y=3\cos(2x)-5
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