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Annotation of researchv10dc/dist/man/v4/man3/atan.3, revision 1.1.1.1

1.1       root        1: .th ATAN III 4/30/73
                      2: .sh NAME
                      3: atan \*- arc tangent function
                      4: .sh SYNOPSIS
                      5: .ft B
                      6: jsr    r5,atan\fR[\fB2\fR]\fB
                      7: .s3
                      8: .br
                      9: double atan(x)
                     10: .br
                     11: double x;
                     12: .br
                     13: .s3
                     14: double atan2(x, y)
                     15: .br
                     16: double x, y;
                     17: .ft R
                     18: .sh DESCRIPTION
                     19: The
                     20: \fIatan\fR entry returns the arc tangent
                     21: of fr0 in fr0;
                     22: from C, the arc tangent of \fIx\fR is returned.
                     23: The range is \*-\*p/2 to \*p/2.
                     24: The \fIatan2\fR entry returns the arc tangent
                     25: of fr0/fr1 in fr0;
                     26: from C, the arc tangent of
                     27: \fIx/y\fR is returned.
                     28: The range is \*-\*p to \(*p.
                     29: .sh DIAGNOSTIC
                     30: There is no error return.
                     31: .sh BUGS

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