OpenEuphoria

Hyperbolic Trigonometry

cosh

include math.e 
namespace math 
public function cosh(object a) 

computes the 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.

Comments:

The hyperbolic cosine grows like the exponential function.

For all reals, power(cosh(x), 2) - power(sinh(x), 2) = 1. Compare with ordinary trigonometry.

Example 1:

? cosh(LN2) -- prints out 1.25 

See Also:

cos, sinh, arccosh