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Scilab Help >> Elementary Functions > Trigonometry > acosm

acosm

matrix wise cosine inverse

Syntax

t = acosm(x)

Arguments

x

a real or complex square matrix.

t

a real or complex square matrix.

Description

t are cosine inverse of the x matrix. Diagonalization method is used. For non-symmetric 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
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Last updated:
Mon Feb 12 19:26:47 CET 2018