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Manual Reference Pages  - CACOSH (3)

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cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine

CONTENTS

Synopsis
Description

#include <complex.h>

double complex cacosh(double complex z);
float complex cacoshf(float complex z);
long double complex cacoshl(long double complex z);

Link with -lm.

The cacosh() function calculates the complex acosh(). 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 nonnegative.

One has cacosh(z) = (0.5)*clog((1+z)/(1-z)).

C99

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