ACOS - Arccosine

  • Last update：July 14, 2023

    • Overview

    Grammar

    ACOS(number)

    Returns the arccosine, namely inverse cosine, of a number. The arccosine value is an angle returned in radian format.

    Parameter

    number

    Cosine of the angle you want.

    Notes

    • The function supports only one number and returns illegal if more than one numbers are set.

    • The parameter must range from - 1 to 1. The returned angle value is between 0 and PI. To display the returned angle in degrees, multiply it by 180/PI().

    Example

    FormulaResultNotes
    ACOS(1)0 (radian)
    ACOS(0.5)1.047197551 (Pi/3 radian)
    ACOS(0.5)*180/PI()60 (degrees)


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