Math & Trig
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=ACOSH()
Returns the inverse hyperbolic cosine of a number. The number must be greater than or equal to 1. The inverse hyperbolic cosine is the value whose hyperbolic cosine is number, so ACOSH(COSH(number)) equals number.
Applies To:
Excel for Microsoft 365Excel for Microsoft 365 for MacExcel 2024Excel 2024 for MacExcel 2021Excel 2021 for MacExcel 2019Excel 2016
=ACOSH(number)
Hover argument names in the table for details.
Output typeNumber
Popularity20 / 100
VolatileNo
Dynamic ArrayNo
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◧ Arguments
| Argument | Type | Required | Description |
|---|---|---|---|
number |
Number | Required | Any real number equal to or greater than 1. |
▣ Examples
Inverse hyperbolic cosine of 1
=ACOSH(1)
Result:
0
Inverse hyperbolic cosine of 10
=ACOSH(10)
Result:
2.9932228
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