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cosm

cosm — matrix cosine function

Calling sequence

t=cosm(x)

Parameters

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, expm
<< coshcos >>