cosm

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