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Scilab help >> Elementary Functions > Trigonometry > cosm

cosm

matrix cosine function

Calling Sequence

t=cosm(x)

Arguments

x

real or complex square matrix

Description

cosm(x) is the matrix cosine of the x matrix. t=0.5*(expm(%i*x)+expm(-%i*x)).

Examples

A=[1,2;3,4]
cosm(A)-0.5*(expm(%i*A)+expm(-%i*A))

See Also

  • cos — cosine function
  • expm — square matrix exponential
<< coshm Trigonometry cotd >>

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Last updated:
Thu Mar 03 10:59:36 CET 2011