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fea681da | 1 | .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) |
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2 | .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk |
3 | .\" <mtk.manpages@gmail.com> | |
2297bf0e | 4 | .\" |
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5 | .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE) |
6 | .\" Distributed under GPL | |
7 | .\" %%%LICENSE_END | |
fea681da | 8 | .\" |
f0d7ce1d | 9 | .TH SINCOS 3 2008-08-11 "GNU" "Linux Programmer's Manual" |
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10 | .SH NAME |
11 | sincos, sincosf, sincosl \- calculate sin and cos simultaneously | |
12 | .SH SYNOPSIS | |
13 | .nf | |
b80f966b | 14 | .BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */" |
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15 | .B #include <math.h> |
16 | .sp | |
17 | .BI "void sincos(double " x ", double *" sin ", double *" cos ); | |
d39541ec | 18 | .br |
fea681da | 19 | .BI "void sincosf(float " x ", float *" sin ", float *" cos ); |
d39541ec | 20 | .br |
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21 | .BI "void sincosl(long double " x ", long double *" sin ", long double *" cos ); |
22 | .fi | |
23 | .sp | |
20c58d70 | 24 | Link with \fI\-lm\fP. |
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25 | .SH DESCRIPTION |
26 | Several applications need sine and cosine of the same angle | |
27 | .IR x . | |
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28 | This function computes both at the same time, and stores the results in |
29 | .I *sin | |
30 | and | |
31 | .IR *cos . | |
32 | ||
33 | If | |
34 | .I x | |
35 | is a NaN, | |
36 | a NaN is returned in | |
37 | .I *sin | |
38 | and | |
39 | .IR *cos . | |
40 | ||
41 | If | |
42 | .I x | |
43 | is positive infinity or negative infinity, | |
efe294cb | 44 | a domain error occurs, and |
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45 | a NaN is returned in |
46 | .I *sin | |
47 | and | |
48 | .IR *cos . | |
49 | .SH RETURN VALUE | |
50 | These functions return | |
51 | .IR void . | |
52 | .SH ERRORS | |
53 | See | |
54 | .BR math_error (7) | |
55 | for information on how to determine whether an error has occurred | |
56 | when calling these functions. | |
57 | .PP | |
58 | The following errors can occur: | |
59 | .TP | |
60 | Domain error: \fIx\fP is an infinity | |
61 | .\" .I errno | |
62 | .\" is set to | |
63 | .\" .BR EDOM . | |
64 | An invalid floating-point exception | |
65 | .RB ( FE_INVALID ) | |
66 | is raised. | |
67 | .PP | |
68 | These functions do not set | |
69 | .IR errno . | |
70 | .\" FIXME . Is it intentional that these functions do not set errno? | |
71 | .\" sin() and cos() also don't set errno; bugs have been raised for | |
72 | .\" those functions. | |
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73 | .SH VERSIONS |
74 | These functions first appeared in glibc in version 2.1. | |
47297adb | 75 | .SH CONFORMING TO |
fea681da | 76 | This function is a GNU extension. |
47297adb | 77 | .SH SEE ALSO |
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78 | .BR cos (3), |
79 | .BR sin (3), | |
0a4f8b7b | 80 | .BR tan (3) |