$$\lim_{x \to 0^-}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right) = 0$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right) = 0$$
$$\lim_{x \to \infty}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right)$$
Más detalles con x→oo$$\lim_{x \to 1^-}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right) = a \log{\left(a \right)} \cos^{2}{\left(1 \right)} - b \log{\left(a \right)} \cos^{2}{\left(1 \right)}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right) = a \log{\left(a \right)} \cos^{2}{\left(1 \right)} - b \log{\left(a \right)} \cos^{2}{\left(1 \right)}$$
Más detalles con x→1 a la derecha$$\lim_{x \to -\infty}\left(\left(a^{x} \log{\left(a \right)} - b^{x} \log{\left(a \right)}\right) \cos^{2}{\left(x \right)}\right)$$
Más detalles con x→-oo