Want to know what's worse? Spherical coordinates. http://en.wikipedia.org/wiki/Spherical_coordinates#Conventions http://en.wikipedia.org/wiki/Spherical_coordin

Want to know what's worse? Spherical coordinates. http://en.wikipedia.org/wiki/Spherical_coordinates#Conventions http://en.wikipedia.org/wiki/Spherical_coordinates#Conventio... You need to remember two different sets of conversions from cartesian to spherical coordinates and two sets of differential elements -and of course, you need to remember which is assumed by which audience.