BOOTSTRAP (klibm) functions


LIBRARY ROUTINE

katanh - compute the arc hyperbolic tangent of the argument.

LIBRARY CALL

double katanh(double x)

INPUT

OUTPUT

none

RETURN VALUE

the double precision arc hyperbolic tangent of the input argument or KMAXFLOAT if the input parameter is less than -1 or greater than 1.

DESCRIPTION

The kasinh function computes the arc hyperbolic tangent of the double precision input argument whose value lies between -1 and 1.

katanh is not a POSIX function, but is implemented in a few BSD math libraries. If it is implemented for the current architecture in libm.a, then this is simply a macro to atanh, otherwise katanh is a macro to the Khoros portable version of atanh.

ADDITIONAL INFORMATION

none

EXAMPLES

none

SIDE EFFECTS

none

RESTRICTIONS

none

MODIFICATION

none

FILES

$BOOTSTRAP/objects/library/klibm/src/klibm.c

SEE ALSO

klibm(3)

COPYRIGHT

Copyright (C) 1993 - 1997, Khoral Research, Inc. ("KRI") All rights reserved.