DragonFly On-Line Manual Pages
CACOSH(3) DragonFly Library Functions Manual CACOSH(3)
NAME
cacosh, cacoshf, cacoshl -- complex inverse 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);
DESCRIPTION
The cacosh(), cacoshf() and cacoshl() functions compute the complex
inverse hyperbolic cosine of z.
For all complex floating-point numbers z,
cacosh(z) = i acos(z).
RETURN VALUES
The cacosh(), cacoshf() and cacoshl() functions return the complex
inverse hyperbolic cosine of z with imaginary part in the interval [-Pi,
Pi], and non-negative real part.
SEE ALSO
casinh(3), catanh(3)
STANDARDS
The cacosh(), cacoshf() and cacoshl() functions conform to ISO/IEC
9899:1999 (``ISO C99'').
DragonFly 4.1 June 5, 2013 DragonFly 4.1