r uchun yechish (complex solution)
r=-\left(\cos(2\theta )\right)^{-\frac{1}{2}}
r=\left(\cos(2\theta )\right)^{-\frac{1}{2}}\text{, }\nexists n_{1}\in \mathrm{Z}\text{ : }\theta =\frac{\pi n_{1}}{2}+\frac{\pi }{4}
r uchun yechish
r=\frac{1}{\sqrt{\cos(2\theta )}}
r=-\frac{1}{\sqrt{\cos(2\theta )}}\text{, }\exists n_{1}\in \mathrm{Z}\text{ : }\left(\theta >\pi n_{1}+\frac{3\pi }{4}\text{ and }\theta <\pi n_{1}+\frac{5\pi }{4}\right)
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