# cf.AuxiliaryCoordinate.sin

`AuxiliaryCoordinate.``sin`(bounds=True, i=False)

  The trigonometric sine of the data array.

  Units are accounted for in the calculation. For example, the the sine of 90 degrees_east is 1.0, as is the sine of 1.57079632 radians. If the units are not equivalent to radians (such as Kelvin) then they are treated as if they were radians.

  The Units are changed to ‘1’ (nondimensionsal).

  See also

  `cos`, `tan`

  Examples 1: |

      >>> g = f.sin()

  Parameters: | bounds: optional Ignored. i: `bool`, optional If True then update the auxiliary coordinate in place. By default a new auxiliary coordinate is created. In either case, a auxiliary coordinate is returned.
  Returns: | out: `cf.AuxiliaryCoordinate` The auxiliary coordinate with the sine of data array values.
  Examples 2: |

      >>> f.Units
      <CF Units: degrees_north>
      >>> print f.array
      [[-90 0 90 --]]
      >>> f.sin()
      >>> f.Units
      <CF Units: 1>
      >>> print f.array
      [[-1.0 0.0 1.0 --]]

      >>> f.Units
      <CF Units: m s-1>
      >>> print f.array
      [[1 2 3 --]]
      >>> f.sin()
      >>> f.Units
      <CF Units: 1>
      >>> print f.array
      [[0.841470984808 0.909297426826 0.14112000806 --]]