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Document that trig functions accept/return values in radians.

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Simon Riggs 2010-03-15 19:03:31 +00:00
parent 1a163a0c68
commit bd11a0f67f
1 changed files with 7 additions and 3 deletions
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10
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.507 2010/03/03 22:28:42 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.508 2010/03/15 19:03:31 sriggs Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -910,7 +910,11 @@
Finally, <xref linkend="functions-math-trig-table"> shows the
available trigonometric functions. All trigonometric functions
take arguments and return values of type <type>double
precision</type>.
precision</type>. Trigonometric functions arguments are expressed
in radians. Inverse functions return values are expressed in
radians. See unit transformation functions
<literal><function>radians</function>()</literal> and
<literal><function>degrees</function>()</literal> above.
</para>
<indexterm>
@ -941,7 +945,7 @@
<table id="functions-math-trig-table">
<title>Trigonometric Functions</title>
<tgroup cols="2">
<tgroup cols="3">
<thead>
<row>
<entry>Function</entry>