casinh, casinhf, casinhl — complex arc sine hyperbolic
#include <complex.h>
double complex casinh( |
double complex | z); |
float
complex casinhf( |
float complex | z); |
long
double complex casinhl( |
long double complex | z); |
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The casinh() function
calculates the complex arc hyperbolic sine of z. If y = casinh(z), then z = csinh(y). The imaginary part
of y is chosen in the interval
[−pi/2,pi/2].
One has:
casinh(z) = clog(z + csqrt(z * z + 1))
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Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de) Distributed under GPL |