catanh, catanhf, catanhl — complex arc tangents hyperbolic
#include <complex.h>
double complex catanh( |
double complex | z) ; |
float
complex catanhf( |
float complex | z) ; |
long
double complex catanhl( |
long double complex | z) ; |
Link with −lm.
The catanh
() function
calculates the complex atanh(). If y = catanh(z), then z =
ctanh(y). The imaginary part of y is chosen in the interval
[−pi/2,pi/2].
One has catanh(z) = 0.5 * clog((1 + z) / (1 − z)).
atanh(3), cabs(3), cimag(3), complex(7)
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