CASIN(3) Linux Programmer's Manual CASIN(3) NAME casin, casinf, casinl - complex arc sine SYNOPSIS #include <complex.h> double complex casin(double complex z); float complex casinf(float complex z); long double complex casinl(long double complex z); Link with -lm. DESCRIPTION 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)) VERSIONS These functions first appeared in glibc in version 2.1. CONFORMING TO C99. SEE ALSO clog(3), csin(3), complex(7) COLOPHON This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-11 CASIN(3)
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