Syntax: @TANH(X)
X = a numeric value expressed in radians
@TANH returns the hyperbolic tangent of angle X. The result is between -1 and 1.
Examples:
@TANH(0) = 0
@TANH(G4) = 0.454216432, where G4 = .49
@TANH(X8) = -1, where X8 = -30