1ATANF(3P) POSIX Programmer's Manual ATANF(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 atanf — arc tangent function
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15 #include <math.h>
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17 float atanf(float x);
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20 Refer to atan().
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23 Portions of this text are reprinted and reproduced in electronic form
24 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
25 table Operating System Interface (POSIX), The Open Group Base Specifi‐
26 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
27 Electrical and Electronics Engineers, Inc and The Open Group. In the
28 event of any discrepancy between this version and the original IEEE and
29 The Open Group Standard, the original IEEE and The Open Group Standard
30 is the referee document. The original Standard can be obtained online
31 at http://www.opengroup.org/unix/online.html .
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33 Any typographical or formatting errors that appear in this page are
34 most likely to have been introduced during the conversion of the source
35 files to man page format. To report such errors, see https://www.ker‐
36 nel.org/doc/man-pages/reporting_bugs.html .
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40IEEE/The Open Group 2017 ATANF(3P)