
{{alias}}( x )
    Computes the half-value coversed cosine of a single-precision floating-point
    number (in radians).

    The half-value coversed cosine is defined as `(1 + sin(x)) / 2`.

    Parameters
    ----------
    x: number
        Input value (in radians).

    Returns
    -------
    y: number
        Half-value coversed cosine.

    Examples
    --------
    > var y = {{alias}}( 3.14 )
    ~0.5008
    > y = {{alias}}( -4.2 )
    ~0.9358
    > y = {{alias}}( -4.6 )
    ~0.9968
    > y = {{alias}}( 9.5 )
    ~0.4624
    > y = {{alias}}( -0.0 )
    0.5

    See Also
    --------

