Linux manual pages Section 3: Subroutines  

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);
 
[Note] Note

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 3.52 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man−pages/.


  Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)

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