sinm matrix sine function

## Syntax

    t = sinm(x)

## Arguments

x, t

  real or complex square matrices.

## Description

`sinm(x)` is matrix sine of `x` matrix.

## Examples

    A=[1,2;2,4];
    sinm(A)+0.5*%i*(expm(%i*A)-expm(-%i*A))

## See also

- sin
- asinm