$$\lim_{x \to 0^-} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}} = e^{- \frac{2}{9}}$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}} = e^{- \frac{2}{9}}$$
$$\lim_{x \to \infty} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}}$$
Más detalles con x→oo$$\lim_{x \to 1^-} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}} = \frac{\left(4 - 5 \cos{\left(1 \right)}\right)^{\frac{1}{\sin^{2}{\left(3 \right)}}} e^{\frac{i \pi}{\sin^{2}{\left(3 \right)}}}}{\cos^{\frac{1}{\sin^{2}{\left(3 \right)}}}{\left(1 \right)}}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}} = \frac{\left(4 - 5 \cos{\left(1 \right)}\right)^{\frac{1}{\sin^{2}{\left(3 \right)}}} e^{\frac{i \pi}{\sin^{2}{\left(3 \right)}}}}{\cos^{\frac{1}{\sin^{2}{\left(3 \right)}}}{\left(1 \right)}}$$
Más detalles con x→1 a la derecha$$\lim_{x \to -\infty} \left(5 - \frac{4}{\cos{\left(x \right)}}\right)^{\frac{1}{\sin^{2}{\left(3 x \right)}}}$$
Más detalles con x→-oo