casin

Section: C Library Functions (3)
Updated: 2022-12-15
Index Return to Main Contents
 

NAME

casin, casinf, casinl - complex arc sine  

LIBRARY

Math library (libm, -lm)  

SYNOPSIS

#include <complex.h>

double complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex z);
 

DESCRIPTION

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))
 

VERSIONS

These functions were added in glibc 2.1.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
casin(), casinf(), casinl() Thread safetyMT-Safe

 

STANDARDS

C99, POSIX.1-2001, POSIX.1-2008.  

SEE ALSO

clog(3), csin(3), complex(7)


 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
VERSIONS
ATTRIBUTES
STANDARDS
SEE ALSO

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Time: 13:38:57 GMT, March 28, 2024