OpenEuphoria

arccosh

include math.e 
namespace math 
public function arccosh(not_below_1 a) 

computes the reverse hyperbolic cosine of an object.

Parameters:

1. x : the object to process.

Returns:

An object, the same shape as x, each atom of which was acted upon.

Errors:

Since cosh only takes values not below 1, an argument below 1 causes an error.

Comments:

The hyperbolic cosine grows like the logarithm function.

Example 1:

? arccosh(1) -- prints out 0 

See Also:

arccos, arcsinh, cosh