How to calculate the degree of rotation between points?

Question

JavaScript

There are two points on the map point a = (55.7526, 37.57) and b = (55.7576, 37.58) An
object located on point a must have a turn angle to look at point b. Those. having these points, you need to calculate the degree of rotation.

Answer 1

This is the wrong task.

Answer 2

Use the usual cosine theorem.

Answer 3

You formulate incorrectly. You have not only 2 points. There cannot be a degree of rotation between two points. At point A, you have an oriented object with some angle. AB form a vector and the object is oriented by the vector. We need to find the angle between the vectors. It's easy to find how.
Or a line lies on AB. The second line also passes through A, but at a certain angle.
In short, you can use several views and solve the problem depending on your knowledge. This is a school program, so you most likely will not receive a specific answer.

Answer 4

1) consider the vector AB = B - A = (Bx - Ax, By - Ay) = (X, Y)
2) the angle is the arc tangent of X / Y. Many languages ​​even have a function (like ATAN2) that just takes two arguments: X and Y.