Running angle

In mathematics, the running angle is the angle of consecutive vectors $(Xt,Yt)$ with respect to the base line, i.e.

$\varphi (t)=\arctan \left(\frac{\mathrm{\Delta }Yt}{\mathrm{\Delta }Xt}\right).$

Usually, it is more informative to compute it using a four-quadrant version of the arctan function in a mathematical software library.

See also

• Differential geometry
• Polar distribution