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-rw-r--r--doc/src/sgml/func.sgml10
1 files changed, 7 insertions, 3 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 38350c1bd35..bf31ee53115 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -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>