cosh

Hiperbolic cosine for ctau object.


Syntax
   f = cosh(c)

Description
   F = cosh(c) is a function to approximate by interpolation cosh(c), c in 
   [a, b].

Input
   c = coefficients of tau method (ctau object).

Output
   f = coefficients of cosh(c).

See also
  sin, sinh, cos, exp and log.