-.TH SIN 3M "19 January 1983"
-.AT 3
-.SH NAME
-sin, cos, tan, asin, acos, atan, atan2 \- trigonometric functions
-.SH SYNOPSIS
-.nf
-.B #include <math.h>
-.PP
-.B double sin(x)
-.B double x;
-.PP
-.B double cos(x)
-.B double x;
-.PP
-.B double asin(x)
-.B double x;
-.PP
-.B double acos(x)
-.B double x;
-.PP
-.B double atan(x)
-.B double x;
-.PP
-.B double atan2(x, y)
-.B double x, y;
-.fi
-.SH DESCRIPTION
-.I Sin, cos
-and
-.I tan
-return trigonometric functions of radian arguments.
-The magnitude of the argument should be checked
-by the caller to make sure the result is meaningful.
-.PP
-.I Asin
-returns the arc sin in the range \-\(*p/2 to \(*p/2.
-.PP
-.I Acos
-returns the arc cosine in the range 0 to \(*p.
-.PP
-.I Atan
-returns the arc tangent of
-.I x
-in the range \-\(*p/2 to \(*p/2.
-.PP
-.I Atan2
-returns the arc tangent of
-.I x/y
-in the range \-\(*p to \(*p.
-.SH DIAGNOSTICS
-Arguments of magnitude greater than 1 cause
-.I asin
-and
-.I acos
-to return value 0;
-.I errno
-is set to EDOM. The value of
-.I tan
-at its singular points is a huge number, and
-.I errno
-is set to ERANGE.
-.SH BUGS
-The value of
-.I tan
-for arguments greater than about 2**31 is garbage.
+.\" @(#)sin.3 8.1 (Berkeley) 6/4/93
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\" must display the following acknowledgement:
+.\" This product includes software developed by the University of
+.\" California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" @(#)sin.3 8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt SIN 3
+.Os
+.Sh NAME
+.Nm sin
+.Nd sine function
+.Sh SYNOPSIS
+.Fd #include <math.h>
+.Ft double
+.Fn sin "double x"
+.Sh DESCRIPTION
+The
+.Fn sin
+function computes the sine of
+.Fa x
+(measured in radians).
+A large magnitude argument may yield a result with little
+or no significance.
+.Sh RETURN VALUES
+The
+.Fn sin
+function returns the sine value.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3 ,
+.Xr math 3 ,
+.Sh STANDARDS
+The
+.Fn sin
+function conforms to
+.St -ansiC .
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