Question

define orthogonal curvilinear coordinates​

Answer 1

Answer:

The location of a point in three-dimensional space (with respect to some

origin) is usually specified by giving its three cartesian coordinates (x, y, z)

or, what is equivalent, by specifying the position vector R of the point

Answer 2

when the system of curvilinear coordinate is such that the three coordinate surfaces are mutually perpendicular at each point