The azimuthal angle is an angle measured from the 
-axis in the 
-plane in spherical coordinates,
denoted 
in this work.
Azimuth
See also
Polar Angle, Spherical Coordinates, Zenith AngleExplore with Wolfram|Alpha
References
Zwillinger, D. (Ed.). "Spherical Coordinates in Space." §4.9.3 in CRC Standard Mathematical Tables and Formulae. Boca Raton, FL: CRC Press, pp. 297-298, 1995.Referenced on Wolfram|Alpha
AzimuthCite this as:
Weisstein, Eric W. "Azimuth." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Azimuth.html