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| Commit | Line | Data |
|---|---|---|
| fea681da | 1 | .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) |
| 2297bf0e | 2 | .\" |
| 38f20bb9 | 3 | .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE) |
| fea681da | 4 | .\" Distributed under GPL |
| 38f20bb9 | 5 | .\" %%%LICENSE_END |
| fea681da | 6 | .\" |
| c73595c2 | 7 | .TH CASIN 3 2015-04-19 "" "Linux Programmer's Manual" |
| fea681da | 8 | .SH NAME |
| c13182ef | 9 | casin, casinf, casinl \- complex arc sine |
| fea681da MK |
10 | .SH SYNOPSIS |
| 11 | .B #include <complex.h> | |
| 68e4db0a | 12 | .PP |
| c13182ef | 13 | .BI "double complex casin(double complex " z ); |
| d39541ec | 14 | .br |
| c13182ef | 15 | .BI "float complex casinf(float complex " z ); |
| d39541ec | 16 | .br |
| c13182ef | 17 | .BI "long double complex casinl(long double complex " z ); |
| 68e4db0a | 18 | .PP |
| 20c58d70 | 19 | Link with \fI\-lm\fP. |
| fea681da | 20 | .SH DESCRIPTION |
| 5600f73a | 21 | These functions calculate the complex arc sine of |
| 41783353 MK |
22 | .IR z . |
| 23 | If \fIy\ =\ casin(z)\fP, then \fIz\ =\ csin(y)\fP. | |
| 24 | The real part of | |
| 25 | .I y | |
| 26 | is chosen in the interval [\-pi/2,pi/2]. | |
| dd3568a1 | 27 | .PP |
| 41783353 | 28 | One has: |
| 207050fa | 29 | .PP |
| 41783353 | 30 | .nf |
| 41783353 MK |
31 | casin(z) = \-i clog(iz + csqrt(1 \- z * z)) |
| 32 | .fi | |
| f0d7ce1d MK |
33 | .SH VERSIONS |
| 34 | These functions first appeared in glibc in version 2.1. | |
| 816fdf48 MS |
35 | .SH ATTRIBUTES |
| 36 | For an explanation of the terms used in this section, see | |
| 37 | .BR attributes (7). | |
| 38 | .TS | |
| 39 | allbox; | |
| 40 | lbw28 lb lb | |
| 41 | l l l. | |
| 42 | Interface Attribute Value | |
| 43 | T{ | |
| 44 | .BR casin (), | |
| 45 | .BR casinf (), | |
| 46 | .BR casinl () | |
| 47 | T} Thread safety MT-Safe | |
| 48 | .TE | |
| 47297adb | 49 | .SH CONFORMING TO |
| 9a74e018 | 50 | C99, POSIX.1-2001, POSIX.1-2008. |
| 47297adb | 51 | .SH SEE ALSO |
| fea681da | 52 | .BR clog (3), |
| 587977c4 | 53 | .BR csin (3), |
| a8bda636 | 54 | .BR complex (7) |