HP-UX Reference (11i v2 04/09) - 3 Library Functions A-M (vol 6)

c
ccosh(3M) ccosh(3M)
(Itanium(R)-based System Only)
NAME
ccosh( ), ccoshf( ), ccoshl(), ccoshw( ), ccoshq( ) - complex hyperbolic cosine functions
SYNOPSIS
#include <complex.h>
double complex ccosh(double complex z);
float complex ccoshf(float complex z);
long double complex ccoshl(long double complex z);
extended complex ccoshw(extended complex z);
quad complex ccoshq(quad complex z);
DESCRIPTION
These functions are available only for Itanium-based systems.
ccosh() returns the complex hyperbolic cosine of z.
ccoshf() is a float complex version of
ccosh(); it takes a float complex argument and
returns a
float complex result.
ccoshl() is a long double complex version of ccosh(); it takes a long double complex
argu-
ment and returns a
long double complex result.
ccoshw() is an extended complex version of ccosh(); it takes an extended complex argument
and returns an extended complex result.
ccoshq() is equivalent to ccoshl() on HP-UX systems.
USAGE
To use these functions, compile with the default
-Ae option. To use ccoshw() or
ccoshq(), compile
with the
-fpwidetypes option. Make sure your program includes <complex.h>. Link in the math
library by specifying -lm on the compiler or linker command line.
RETURN VALUE
ccosh(conj(z)) = conj(ccosh(z)) and ccosh is even.
ccosh(+0+i0) returns 1+i0.
ccosh(+0+iInf) returns NaN±i0 (where the sign of the imaginary part of the result is unspecified) and
raises the invalid floating-point exception.
ccosh(+0+iNaN) returns NaN±i0 (where the sign of the imaginary part of the result is unspecified).
ccosh(x+iInf) returns NaN+iNaN and raises the invalid floating-point exception, for finite nonzero x.
ccosh(x+iNaN) returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite
nonzero x.
ccosh(+Inf+i0) returns +Inf+i0.
ccosh(+Inf+iy) returns +Inf(cos(y)+isin(y)), for finite nonzero y.
ccosh(+Inf+iInf) returns ±Inf+iNaN (where the sign of the real part of the result is unspecified) and
raises the invalid floating-point exception.
ccosh(+Inf+iNaN) returns +Inf+iNaN.
ccosh(NaN+i0) returns NaN±i0 (where the sign of the imaginary part of the result is unspecified).
ccosh(NaN+iy) returns NaN+iNaN and optionally raises the invalid floating-point exception, for all
nonzero numbers y.
ccosh(NaN+iNaN) returns NaN+iNaN.
ERRORS
No errors are defined.
SEE ALSO
cosh(3M), cacosh(3M), complex(5).
Section 3−−94 Hewlett-Packard Company − 1 − HP-UX 11i Version 2: September 2004