cacosh
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Name

cacosh, cacoshf, cacoshl — complex arc hyperbolic cosine

Synopsis

#include <complex.h>
double complex cacosh( double complex   z);
float complex cacoshf( float complex   z);
long double complex cacoshl( long double complex   z);
[Note] Note

Link with −lm.

DESCRIPTION

The cacosh() function calculates the complex arc hyperpolic cosinze of z. If y = cacosh(z), then z = ccosh(y). The imaginary part of y is chosen in the interval [−pi,pi]. The real part of y is chosen non-negative.

One has:

    cacosh(z) = (0.5) * clog((1 + z) / (1 − z))

CONFORMING TO

C99

SEE ALSO

acosh(3), cabs(3), cimag(3), complex(7)

COLOPHON

This page is part of release 2.79 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


  Copyright 2002 Walter Harms(walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL
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