I have two points on the circumference of circle, and I also know the center of the circle. I want to calculate the angle between those two points which are on the circumference of circle.
Is this formula suitable to this situation?
$\tan(\theta) = \frac{y_2-y_1}{x_2-x_1}$
where $(x_1,y_1)$ are one of the circumference points and $(x_2,y_2)$ is the other point on the circumference.