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127 lines
2.9 KiB
XML
127 lines
2.9 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<reference id="ref.math">
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<title>Mathematische Funktionen</title>
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<titleabbrev>Math.</titleabbrev>
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<partintro>
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<section id="math.intro">
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<title>Einleitung</title>
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<para>
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Die mathematischen Funktionen behandeln nur Werte im Bereich der
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Datentypen long und double der jeweiligen Architektur. Wenn Sie
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größere Zahlen oder Werte mit höherer Genauigkeit benötigen,
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sollten Sie sich die <link linkend="ref.bc">mathematische
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Funktionen mit beliebiger Genauigkeit</link> ansehen.
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</para>
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<section id="math.constants">
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<title>Mathematische Konstanten</title>
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<para>
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Die folgenden Werte werden von diesem Packet definiert:
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<table>
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<title>Mathematische Konstanten</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Konstante</entry>
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<entry>Wert</entry>
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<entry>Beschreibung</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>M_PI</entry>
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<entry>3.14159265358979323846</entry>
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<entry>Der Wert ¶ (Pi)</entry>
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</row>
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<row>
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<entry>M_E</entry>
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<entry>2.7182818284590452354</entry>
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<entry>e</entry>
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</row>
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<row>
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<entry>M_LOG2E</entry>
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<entry>1.4426950408889634074</entry>
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<entry>log_2 e</entry>
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</row>
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<row>
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<entry>M_LOG10E</entry>
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<entry>0.43429448190325182765</entry>
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<entry>log_10 e</entry>
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</row>
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<row>
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<entry>M_LN2</entry>
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<entry>0.69314718055994530942</entry>
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<entry>log_e 2</entry>
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</row>
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<row>
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<entry>M_LN10</entry>
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<entry>2.30258509299404568402</entry>
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<entry>log_e 10</entry>
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</row>
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<row>
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<entry>M_PI_2</entry>
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<entry>1.57079632679489661923</entry>
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<entry>pi/2</entry>
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</row>
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<row>
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<entry>M_PI_4</entry>
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<entry>0.78539816339744830962</entry>
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<entry>pi/4</entry>
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</row>
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<row>
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<entry>M_1_PI</entry>
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<entry>0.31830988618379067154</entry>
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<entry>1/pi</entry>
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</row>
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<row>
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<entry>M_2_PI</entry>
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<entry>0.63661977236758134308</entry>
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<entry>2/pi</entry>
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</row>
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<row>
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<entry>M_2_SQRTPI</entry>
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<entry>1.12837916709551257390</entry>
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<entry>2/sqrt(pi)</entry>
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</row>
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<row>
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<entry>M_SQRT2</entry>
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<entry>1.41421356237309504880</entry>
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<entry>sqrt(2)</entry>
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</row>
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<row>
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<entry>M_SQRT1_2</entry>
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<entry>0.70710678118654752440</entry>
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<entry>1/sqrt(2)</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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Bis auf M_PI sind diese Konstanten erst ab PHP4.0 verfügbar.
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</para>
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</section>
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</section>
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</partintro>
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&reference.math.functions;
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</reference>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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-->
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