cost

Cosine by tau approximation for itau object.


Syntax
   [F, e, n] = cost(x)

Description
   F = cost(x) is a function to approximate by tau method cos(x), x in 
   [a, b]. 

Input
   x = independent tau variable (itau object).

Output
   F = polynomial approximation of cos(x) in [a, b] evaluated (with 
       orthovalM) in argument M = matrixM(x) (double matrix).

See also
  sint, sinht, cosht, expt and logt.