ccosh(), ccoshf(), ccoshl()

Compute the complex hyperbolic cosine

Synopsis:

#include <complex.h>

double complex ccosh( double complex z );

float complex ccoshf( float complex z );

long double complex ccoshl( long double complex z );

Arguments:

z
The value that you want to get the complex hyperbolic cosine of.

Library:

libm

Use the -l m option to qcc to link against this library.

Description:

These functions compute the complex hyperbolic cosine of z.

To check for error situations, use feclearexcept() and fetestexcept():

Returns:

The complex hyperbolic cosine of z.

If z is: These functions return:
+0+0i 1+0i
+0+i NaN±0i (the sign of the imaginary part is unspecified) and FE_INVALID is raised
+0+NaNi NaN±0i (the sign of the imaginary part is unspecified)
x+i (for any finite non-zero x) NaN+NaNi and FE_INVALID is raised
x+NaNi (for any finite non-zero x) NaN+NaNi and FE_INVALID may be raised
++0i ++0i
++yi (for any finite nonzero y) ++cis(y)
++i ±+NaNi (the sign of the real part is unspecified) and FE_INVALID is raised
++NaN ++NaN
NaN+0i NaN±0i (the sign of the imaginary part is unspecified)
NaN+yi (for any finite nonzero y) NaN+NaNi and FE_INVALID may be raised
NaN+NaNi NaN+NaNi

where cis(y) is cos(y) + i sin(y)

Classification:

ANSI, POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes