Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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>asin</H1
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><P
>    (PHP 3, PHP 4 )</P
>asin&nbsp;--&nbsp;Arc sine</DIV
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><H2
>Description</H2
>float <B
CLASS="methodname"
>asin</B
> ( float arg)<BR
></BR
><P
>&#13;     Returns the arc sine of <TT
CLASS="parameter"
><I
>arg</I
></TT
> in radians.
     <B
CLASS="function"
>asin()</B
> is the complementary function of
     <A
HREF="function.sin.html"
><B
CLASS="function"
>sin()</B
></A
>, which means that
     <TT
CLASS="literal"
>a==sin(asin(a))</TT
> for every value of a that is within
     <B
CLASS="function"
>asin()</B
>'s range.
    </P
><P
>&#13;     See also <A
HREF="function.asinh.html"
><B
CLASS="function"
>asinh()</B
></A
>, <A
HREF="function.acos.html"
><B
CLASS="function"
>acos()</B
></A
>
     and <A
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><B
CLASS="function"
>atan()</B
></A
>.
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