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-rw-r--r--doc/expr.n34
1 files changed, 18 insertions, 16 deletions
diff --git a/doc/expr.n b/doc/expr.n
index 5fb3cee..abf760a 100644
--- a/doc/expr.n
+++ b/doc/expr.n
@@ -5,7 +5,7 @@
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
-'\" RCS: @(#) $Id: expr.n,v 1.5 2000/09/07 14:27:47 poenitz Exp $
+'\" RCS: @(#) $Id: expr.n,v 1.6 2001/12/03 10:42:47 dkf Exp $
'\"
.so man.macros
.TH expr n 8.4 Tcl "Tcl Built-In Commands"
@@ -205,19 +205,21 @@ Returns the absolute value of \fIarg\fR. \fIArg\fR may be either
integer or floating-point, and the result is returned in the same form.
.TP
\fBacos(\fIarg\fB)\fR
-Returns the arc cosine of \fIarg\fR, in the range [0,pi]
-radians. \fIArg\fR should be in the range [-1,1].
+Returns the arc cosine of \fIarg\fR, in the range [\fI0\fR,\fIpi\fR]
+radians. \fIArg\fR should be in the range [\fI-1\fR,\fI1\fR].
.TP
\fBasin(\fIarg\fB)\fR
-Returns the arc sine of \fIarg\fR, in the range [-pi/2,pi/2] radians.
-\fIArg\fR should be in the range [-1,1].
+Returns the arc sine of \fIarg\fR, in the range [\fI-pi/2\fR,\fIpi/2\fR]
+radians. \fIArg\fR should be in the range [\fI-1\fR,\fI1\fR].
.TP
\fBatan(\fIarg\fB)\fR
-Returns the arc tangent of \fIarg\fR, in the range [-pi/2,pi/2] radians.
+Returns the arc tangent of \fIarg\fR, in the range [\fI-pi/2\fR,\fIpi/2\fR]
+radians.
.TP
-\fBatan2(\fIx, y\fB)\fR
-Returns the arc tangent of \fIy\fR/\fIx\fR, in the range [-pi,pi]
-radians. \fIx\fR and \fIy\fR cannot both be 0.
+\fBatan2(\fIy, x\fB)\fR
+Returns the arc tangent of \fIy\fR/\fIx\fR, in the range [\fI-pi\fR,\fIpi\fR]
+radians. \fIx\fR and \fIy\fR cannot both be 0. If \fIx\fR is greater
+than \fI0\fR, this is equivalent to \fBatan(\fIy/x\fB)\fR.
.TP
\fBceil(\fIarg\fB)\fR
Returns the smallest integer value not less than \fIarg\fR.
@@ -234,8 +236,8 @@ If \fIarg\fR is a floating value, returns \fIarg\fR, otherwise converts
\fIarg\fR to floating and returns the converted value.
.TP
\fBexp(\fIarg\fB)\fR
-Returns the exponential of \fIarg\fR, defined as e**\fIarg\fR. If the
-result would cause an overflow, an error is returned.
+Returns the exponential of \fIarg\fR, defined as \fIe\fR**\fIarg\fR.
+If the result would cause an overflow, an error is returned.
.TP
\fBfloor(\fIarg\fB)\fR
Returns the largest integral value not greater than \fIarg\fR.
@@ -246,7 +248,7 @@ Returns the floating-point remainder of the division of \fIx\fR by
.TP
\fBhypot(\fIx, y\fB)\fR
Computes the length of the hypotenuse of a right-angled triangle
-(\fIx\fR*\fIx\fR+\fIy\fR*\fIy\fR).
+\fBsqrt(\fIx\fR*\fIx\fR+\fIy\fR*\fIy\fB)\fR.
.TP
\fBint(\fIarg\fB)\fR
If \fIarg\fR is an integer value, returns \fIarg\fR, otherwise converts
@@ -265,10 +267,10 @@ Computes the value of \fIx\fR raised to the power \fIy\fR. If \fIx\fR
is negative, \fIy\fR must be an integer value.
.TP
\fBrand()\fR
-Returns a floating point number from zero to just less than one or,
-in mathematical terms, the range [0,1). The seed comes from the
-internal clock of the machine or may be set manual with the srand
-function.
+Returns a floating point number from zero to just less than one or, in
+mathematical terms, the range [\fI0\fR,\fI1\fR). The seed comes from
+the internal clock of the machine or may be set manual with the
+\fBsrand\fR function.
.TP
\fBround(\fIarg\fB)\fR
If \fIarg\fR is an integer value, returns \fIarg\fR, otherwise converts