cosi

Cosine by orthogonal interpolation for itau object.


Syntax
   F = cosi(x)

Description
   F = cosi(A) is a function to approximate by orthogonal interpolation 
   cos(A), where A is a matrix or an itau object.

Input
   A = independent tau variable (itau object) or any matrix.

Output
   F = polynomial approximation of cos(A) in [a, b] evaluated with
       orthovalM (itau object: F.mat contains the matrix).

See also
  sini, cosi, sinhi, coshi, expi, logi and sqrti.