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