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function.acos.html
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<HTML
><HEAD
><TITLE
>acos</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
HREF="manual.html"><LINK
REL="UP"
TITLE="Mathematical Functions"
HREF="ref.math.html"><LINK
REL="PREVIOUS"
TITLE="abs"
HREF="function.abs.html"><LINK
REL="NEXT"
TITLE="asin"
HREF="function.asin.html"><META
NAME="HTTP_EQUIV"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
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><TR
><TH
COLSPAN="3"
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>PHP Manual</TH
></TR
><TR
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ALIGN="left"
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><A
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>Prev</A
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><HR
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><H1
><A
NAME="function.acos"
>acos</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN19696"
></A
><P
> (PHP3 , PHP4 )</P
>acos -- Arc cosine</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN19699"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN19701"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>float <B
CLASS="function"
>acos</B
></CODE
> (float arg)</CODE
></P
><P
></P
></DIV
><P
> Returns the arc cosine of arg in radians.
</P
><P
> See also <A
HREF="function.asin.html"
><B
CLASS="function"
>asin()</B
></A
> and <A
HREF="function.atan.html"
><B
CLASS="function"
>atan()</B
></A
>.
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></DIV
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