ACOSH

Trigonometric function that returns the hyperbolic arc-cosine of a number

Implemented by: Gambas

With variations:

Also written as:

Gambas also accepts the function written as Acsh().

The BASIC Cookbook points out that BASICs which don't implement the function can achieve the same results, for a given X argument, with the following formula:

LOG(X + SQR(X*X - 1))

• https://gambaswiki.org/wiki/lang/acosh , last check 2024-02-16
• TRACTON, Ken. The BASIC Cookbook, 1st edition. Tab Books. USA, 1978.