acosm

matrix wise cosine inverse

Calling Sequence

t=acosm(x)

Arguments

: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))

Examples

A=[1,2;3,4];
`cosm`_(acosm(A))

See Also

• acos element wise cosine inverse (radians)
• sqrtm matrix square root
• logm square matrix logarithm