Translations:Documentation/Calc Functions/ACOSH/20/en

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Formula Description Returns
=ACOSH(1) Inverse hyperbolic cosine of 1. 0
=ACOSH(COSH(4)) Inverse hyperbolic cosine of hyperbolic cosine of 4. 4
=ACOSH(1.5) Inverse hyperbolic cosine of 1.5. 0.962423650119207
=ACOSH(0.5) Inverse hyperbolic cosine of 0.5 will return an error because 0.5 is out of its domain. Err:502