Method on @infsup: cosh (X)

Compute the hyperbolic cosine.

Accuracy: The result is a tight enclosure.

cosh (infsup (1))
  ⇒ ans ⊂ [1.543, 1.5431]

See also: @infsup/acosh, @infsup/sech, @infsup/sinh, @infsup/tanh.

Package: interval