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Annotation of researchv10dc/man/adm/man9/cos.9, revision 1.1

1.1     ! root        1: .TH COS 9.3
        !             2: .CT 2 math
        !             3: .SH NAME
        !             4: cos, sin, atan2, sqrt, norm \- integer math functions
        !             5: .SH SYNOPSIS
        !             6: .B int cos(d)
        !             7: .B int d;
        !             8: .PP
        !             9: .B int sin(d)
        !            10: .B int d;
        !            11: .PP
        !            12: .B int atan2(x, y)
        !            13: .B int x, y;
        !            14: .PP
        !            15: .B int norm(x, y, z)
        !            16: .B int x, y, z;
        !            17: .PP
        !            18: .B int sqrt(x)
        !            19: .B long x;
        !            20: .PP
        !            21: .SH DESCRIPTION
        !            22: .I Cos
        !            23: and
        !            24: .I sin
        !            25: return scaled integer approximations to the trigonometric functions.
        !            26: The argument values are in degrees.
        !            27: The return values are scaled so that
        !            28: .BR cos(0)==1024 .
        !            29: Thus, to calculate the mathematical expression
        !            30: .if t .IR x \|=\| a\^ cos( d ),
        !            31: .if n .IR x = x0 *cos( d ),
        !            32: the multiplication must be scaled:
        !            33: .IP
        !            34: .L
        !            35: x = muldiv(x0, cos(d), 1024)
        !            36: .PP
        !            37: .I Atan2
        !            38: returns the approximate arc-tangent of
        !            39: .IR  y / x .
        !            40: The return value is in integral degrees.
        !            41: .PP
        !            42: .I Sqrt
        !            43: returns the 16-bit signed integer closest to the
        !            44: square root of its 32-bit signed argument.
        !            45: .PP
        !            46: .I Norm
        !            47: returns the Euclidean length of the three-vector
        !            48: .RI ( x ,
        !            49: .IR y ,
        !            50: .IR z ).
        !            51: .SH DIAGNOSTICS
        !            52: .I Sqrt
        !            53: returns 0 for negative arguments; and
        !            54: .BR atan2(0,0)==0.
        !            55: .IR Norm
        !            56: does not protect against overflow.
        !            57: .SH BUGS
        !            58: .I Atan2
        !            59: may be off by as much as two degrees.

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