$$\lim_{x \to 1^-}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
$$\lim_{x \to \infty}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right)$$
Más detalles con x→oo$$\lim_{x \to 0^-}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{1}{96 \log{\left(2 \right)}}$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{1}{96 \log{\left(2 \right)}}$$
Más detalles con x→0 a la derecha$$\lim_{x \to -\infty}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = 0$$
Más detalles con x→-oo