$$\lim_{x \to 0^-} \sqrt{\cot{\left(x \right)}} = \infty$$ More at x→0 from the left $$\lim_{x \to 0^+} \sqrt{\cot{\left(x \right)}} = \infty$$ $$\lim_{x \to \infty} \sqrt{\cot{\left(x \right)}}$$ More at x→oo $$\lim_{x \to 1^-} \sqrt{\cot{\left(x \right)}} = \frac{1}{\sqrt{\tan{\left(1 \right)}}}$$ More at x→1 from the left $$\lim_{x \to 1^+} \sqrt{\cot{\left(x \right)}} = \frac{1}{\sqrt{\tan{\left(1 \right)}}}$$ More at x→1 from the right $$\lim_{x \to -\infty} \sqrt{\cot{\left(x \right)}}$$ More at x→-oo