geometry - Convert a direction into an angle on our compass - Mathematics Stack Exchange

I have a new position vector and old x and z coordinates and I need to determine the angle traveled. So far I am getting the slopes absolute value and then using that to generate an angle. Based on

Book : The Contact Patch

algorithm - What's the best way of transforming a 2D vector into

Transformation - BrainPOP

Complex number - Wikipedia

How maths can make you rich and famous: Part II

Polar coordinates - Math Insight

How to determine the direction of the electric field (E) and the

algorithm - How to calculate the angle of a vector from the

geometry - Did 4 other angles that equal x - Mathematics Stack

Tangent lines to circles - Wikipedia

math - Scale rectangle to fit inside a rotated rectangle - Stack

Building a compass web app

mathematics - Is there a quick way to determine if a vector is in

MatheMaticsof space by Download BS-E - Issuu