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casin(3) Library Functions Manual casin(3)
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). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │casin(), casinf(), casinl() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
clog(3), csin(3), complex(7)
Linux man-pages 6.04 2023-03-30 casin(3)
Pages that refer to this page: asin(3), csin(3), complex(7)