Oracle PL/SQL Programming, Third Edition

Name

TANH

Synopsis

The TANH trigonometric function returns the hyperbolic tangent of the specified number. The specification for the TANH function is:

FUNCTION TANH (n NUMBER) RETURN NUMBER;

If n is a real number and i is the imaginary square root of -1, then the relationship between TAN and TANH can be expressed as follows:

TAN (i * n) = i * TANH (n)