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v4.0
    v4.0

    acos() | Arccosine

    Parameters, Value

    Arccosine function calculates the radians of the cosine value, the input is [-1, 1], and the output is [0, PI].

    • Format:
    • Parameters: see table below
    • Value: ATTR ( number ), and it should be >= 0 and <= PI
    Name Category Specification Description
    radian ATTR(number) / The cosine value to be calculated

    Common Usage

    Example: calculate the radian of the cosine value 0.5

    return acos(0.5) * 180 / pi()
    

    Example: calculate the radians of a column of cosine values

    uncollect [1, -0.5, 0] as a
    return acos(a)
    
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