Translations:Documentation/Calc Functions/IMLN/16/en

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    For a complex number of the form a+bi, the natural logarithm is given by the following equation:

    Equation for IMLN function

    IMLN uses an alternative formulation for the imaginary part based on an equivalent inverse cosine function call instead of the inverse tangent function call, along with a necessary check to ensure that the correct sign is applied to the imaginary part of the result.