1. $c{\mathrm{ot}}^2\theta -\left(\sqrt{3}+4\right)c\mathrm{ot}\theta +\sqrt{3}=0,0$

• A. $\frac{\mathrm{\pi }}{6}, \frac{\mathrm{\pi }}{3}$
• B. $\frac{\mathrm{\pi }}{6}, \frac{\mathrm{\pi }}{3}$
• C. $\frac{\mathrm{\pi }}{6}, \frac{\mathrm{\pi }}{3}$
• D. $\frac{\mathrm{\pi }}{6}, \frac{\mathrm{\pi }}{3}$

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