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