(* *) The hyperbolic cosine function cosh (x ) is defined as follows: cosh (a) = etex 2 Find the sixth degree Taylor Polynomial To (x) for cosh (3x ) about x = 0. To(20) = + . + 2 . x + + 4 5 + . 76 (Hint. Don't try to calculate this manually! Work backwards from Taylor polynomials that you know.)