$$\lim_{x \to \infty}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right)$$
$$\lim_{x \to 0^-}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right) = - \frac{2}{225}$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right) = - \frac{2}{225}$$
Más detalles con x→0 a la derecha$$\lim_{x \to 1^-}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right) = \frac{\log{\left(1 - \tan^{2}{\left(\frac{1}{5} \right)} \right)}}{-1 + \sqrt{\sin^{2}{\left(3 \right)} + 1}}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right) = \frac{\log{\left(1 - \tan^{2}{\left(\frac{1}{5} \right)} \right)}}{-1 + \sqrt{\sin^{2}{\left(3 \right)} + 1}}$$
Más detalles con x→1 a la derecha$$\lim_{x \to -\infty}\left(\frac{\log{\left(1 - \tan^{2}{\left(\frac{x}{5} \right)} \right)}}{\sqrt{\sin^{2}{\left(3 x \right)} + 1} - 1}\right)$$
Más detalles con x→-oo