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scilab 2.6-4
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acosm            Scilab Group            Scilab Function              acosm
NAME
   acosm - matrix wise cosine inverse
  
CALLING SEQUENCE
 t=acosm(x)
PARAMETERS
 x          : real or complex square matrix
            
 t          : real or complex square matrix
            
DESCRIPTION
    t are cosine inverse of the x matrix. Diagonalization method is used.
  For nonsymmetric matrices result may  be inaccurate.One has
  t=-%i*logm(x+%i*sqrtm(eye()-x*x))
  
EXAMPLE
 A=[1,2;3,4];
 cosm(acosm(A))
SEE ALSO
   acos, sqrtm, logm