$$\lim_{x \to \frac{\pi}{2}^-}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = 1$$
More at x→pi/2 from the left$$\lim_{x \to \frac{\pi}{2}^+}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = 1$$
$$\lim_{x \to \infty}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right)$$
More at x→oo$$\lim_{x \to 0^-}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = -\infty$$
More at x→0 from the left$$\lim_{x \to 0^+}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = \infty$$
More at x→0 from the right$$\lim_{x \to 1^-}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = - \frac{\sin{\left(1 \right)}}{-1 + \cos{\left(1 \right)}}$$
More at x→1 from the left$$\lim_{x \to 1^+}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right) = - \frac{\sin{\left(1 \right)}}{-1 + \cos{\left(1 \right)}}$$
More at x→1 from the right$$\lim_{x \to -\infty}\left(\frac{\sin{\left(x \right)}}{1 - \cos{\left(x \right)}}\right)$$
More at x→-oo