Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Please login or create an account
Change language to: Français - Português - 日本語

Please note that the recommended version of Scilab is 6.1.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Elementary Functions > Trigonometry > acoshm

# acoshm

matrix hyperbolic inverse cosine

### Calling Sequence

`t=acoshm(x)`

### Arguments

x,t

real or complex square matrix

### Description

acoshm is the matrix hyperbolic inverse cosine of the matrix x. Uses the formula `t=logm(x+(x+eye())*sqrtm((x-eye())/(x+eye())))` For non symmetric matrices result may be inaccurate.

### Examples

```A=[1,2;3,4];
coshm(acoshm(A))
A(1,1)=A(1,1)+%i;
coshm(acoshm(A))```

### See Also

• acosh — hyperbolic cosine inverse
• logm — square matrix logarithm
• sqrtm — matrix square root

### Comments

Add a comment:
Please login to comment this page.

 << acosh Trigonometry acosm >>

 Scilab EnterprisesCopyright (c) 2011-2017 (Scilab Enterprises)Copyright (c) 1989-2012 (INRIA)Copyright (c) 1989-2007 (ENPC)with contributors Last updated:Wed Oct 05 12:09:40 CEST 2011