# cf.CellMeasure.sin

`CellMeasure.``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 cell measure in place. By default a new cell measure is created. In either case, a cell measure is returned.
  Returns: | out: `cf.CellMeasure` The cell measure 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 --]]