====== ACOSH ======
/* Remove the comments after creating content for each section.*/

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

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**Implemented by:** [[:basics:Gambas:]]

**With variations:** 

**Also written as: ** 

===== Usage =====
/* For inline examples of syntax, write the keyword between '' and '' (two single quotes) */


==== Variations ====

Gambas also accepts the function written as **Acsh()**.

===== Examples =====
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  Below is an example of a code block, using GeSHi syntax highlighting for //gwbasic//. Other styles of interest might be
  //basic4gl//, //blitzbasic//, //freebasic//, //gambas//, //locobasic//, //purebasic//, //qbasic//, //sdlbasic//,
  //thinbasic//, //vb//, //vbnet//, //xbasic// or //zxbasic//. 

  <code gwbasic>
  10 PRINT "HELLO"
  </code>
*/



===== Comments =====
/* Origin of the keyword, opinions, history... */

//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))

===== Related keywords =====
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===== Similar keywords =====
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===== In other languages... =====
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===== References =====
/* If you used the ((citation)) syntax elsewhere in the text, they will appear under this section. But you can write some recommendations of books, magazines, etc */

  * https://gambaswiki.org/wiki/lang/acosh , last check 2024-02-16
  * TRACTON, Ken. //The BASIC Cookbook//, 1st edition. Tab Books. USA, 1978.
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{{tag>Functions Trigonometry Mathematics}}