ACOSL(3P)

💖 ACOSL(3P) — bestie edition 💖

POSIX Programmer's Manual ✨ the arc cosine functions, but make it long double

🌸 PROLOG 🌸

okay so heads up first, this page is literally part of the POSIX Programmer's Manual. meaning:

• the Linux implementation of this interface may differ — so go check the corresponding Linux manual page for the actual Linux tea, fr fr
• or honestly?? the interface may not even be implemented on Linux at all 💀

so vibe check before you build your whole personality around it, bestie 🫶

🎀 NAME 🎀

acosl — arc cosine functions ✨

like. it's the arc cosine. but long double. that's the whole plot 🍓

🦋 SYNOPSIS 🦋

#include <math.h>

long double acosl(long double x);

she's giving one function, one long double argument, one long double back 👑 no drama, no extra params, just vibes.

✨ DESCRIPTION ✨

so basically: refer to acos() 💅

that's it. that's the description. the l is just the long double version of the same story, so all the real explanation lives over in the acos() page. go read that one, i promise it's worth it 😭

🌈 COPYRIGHT 🌈

okay legal era, don't skip this one bestie, it's important:

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group.

and if there's ever any discrepancy between this version and the original IEEE and The Open Group Standard — the original IEEE and The Open Group Standard is the referee document. periodt. the original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format 🙈 (not me, not you, the converter). To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group did this one back in 2017, and that's the whole ACOSL(3P) page — short, sweet, long double, iconic ⭐ go forth and compute your arc cosines responsibly, mwah 💋🧚‍♀️