Tentukan nilai limit berikut ini (jika ada) a. limx→1tan(x2−1)sin(x−1)\lim_{x\to1}\frac{\tan\left(x^2-1\right)}{\sin\left(x-1\right)}x→1limsin(x−1)tan(x2−1) b. limx→∞x(9+1x−3)\lim_{x\to\infty}x_{\left(\sqrt{9+\frac{1}{x}}-3\right)}x→∞limx(9+x1−3)