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ACOSH function: Description, Usage, Syntax, Examples and Explanation

What is ACOSH function in Excel?

ACOSH function is one of the Math and Trig functions in Microsoft Excel that 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.

Syntax of ACOSH function

ACOSH(number)

The ACOSH function syntax has the following arguments:

  • Number: Any real number equal to or greater than 1.

Example of ACOSH function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

Formula Description Result
=ACOSH(1) Inverse hyperbolic cosine of 1 0
=ACOSH(10) Inverse hyperbolic cosine of 10 2.9932228

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