ACOSH

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Returns the inverse hyperbolic cosine of a number. 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

ACOSH ( number )

Number is any real number equal to or greater than 1.

Example

Formula

Description (Result)

=ACOSH(1)

Inverse hyperbolic cosine of 1 (0)

=ACOSH(10)

Inverse hyperbolic cosine of 10 (2.993223)

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