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Scilab help >> Elementary Functions > Trigonometry > acosm

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
<< acoshm Trigonometry acot >>

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Last updated:
Wed Oct 05 12:09:40 CEST 2011