cacosh, cacoshf, cacoshl — complex arc hyperbolic cosine
#include <complex.h>
double complex cacosh( |
double complex | z); |
float
complex cacoshf( |
float complex | z); |
long
double complex cacoshl( |
long double complex | z); |
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The cacosh() function
calculates the complex arc hyperpolic cosine 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))
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Copyright 2002 Walter Harms(walter.harmsinformatik.uni-oldenburg.de) Distributed under GPL |