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cosm

matrix cosine function

Syntax

t = cosm(x)

Arguments

x

a 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
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with contributors 		Last updated:
Mon May 22 12:37:05 CEST 2023