ARCOTH

Syntax ARCOTH (x)
Location Hyper

This function returns the arc hyperbolic cotangent of the specified value ie.

ARCOTH ( COTH ( x )) = x

Or to keep it simple, it can be returned with the equivalent expression LN((x+1) / (x-1)) / 2

CROSS-REFERENCE

See ACOT, ARCOSH, and ARTANH.