casin, casinf, casinl − complex arc sine
Math library (libm, −lm)
#include <complex.h>
double
complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex
z);
These functions calculate 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))
For an explanation of the terms used in this section, see attributes(7). |
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
clog(3), csin(3), complex(7)