Create an tangent raster from an input GeoDataset.
[C#]
/// <summary>
/// Create an tangent raster from an input GeoDataset.
/// </summary>
/// <param name="geoDataset">An IGeoDataset interface that has cell values that need to have tangent value computed.</param>
/// <returns>An IGeoDataset interface that contains tangent values of the input raster.</returns>
/// <remarks>
/// Note: the input geoDataset must be of Type IRaster, IRasterDataset, IRasterBand, or IRasterDescriptor.
/// 
/// For information about the ITrigOp.Tan Method see:
/// http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/ITrigOp_Tan.htm
/// 
/// For more information on working with the ArcGIS Spatial Anaylst objects see:
/// http://edndoc.esri.com/arcobjects/9.2/CPP_VB6_VBA_VCPP_Doc/COM/VB6/working/work_rasters/sptl_analyst_objs.htm
/// </remarks>
public ESRI.ArcGIS.Geodatabase.IGeoDataset CreateTrigOpTanRaster(ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset)
{
    if (geoDataset is ESRI.ArcGIS.Geodatabase.IRaster | geoDataset is ESRI.ArcGIS.Geodatabase.IRasterDataset | geoDataset is ESRI.ArcGIS.DataSourcesRaster.IRasterBand | geoDataset is ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor)
    {
        //Create the RasterMathOps object
        ESRI.ArcGIS.SpatialAnalyst.ITrigOp trigOp = new ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass();
        // Create the output raster object			
        ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset_output = trigOp.Tan(geoDataset);
        return geoDataset_output;
    }
    else
    {
        //Invalid type of GeoDataset for this process
        return null;
    }
}
[Visual Basic .NET]
''' <summary>
''' Create an tangent raster from an input GeoDataset.
''' </summary>
''' <param name="geoDataset">An IGeoDataset interface that has cell values that need to have tangent value computed.</param>
''' <returns>An IGeoDataset interface that contains tangent values of the input raster.</returns>
''' <remarks>
''' Note: the input geoDataset must be of Type IRaster, IRasterDataset, IRasterBand, or IRasterDescriptor.
''' 
''' For information about the ITrigOp.Tan Method see:
''' http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/ITrigOp_Tan.htm
''' 
''' For more information on working with the ArcGIS Spatial Anaylst objects see:
''' http://edndoc.esri.com/arcobjects/9.2/CPP_VB6_VBA_VCPP_Doc/COM/VB6/working/work_rasters/sptl_analyst_objs.htm
''' </remarks>
Public Function CreateTrigOpTanRaster(ByVal geoDataset As ESRI.ArcGIS.Geodatabase.IGeoDataset) As ESRI.ArcGIS.Geodatabase.IGeoDataset
  If (TypeOf geoDataset Is ESRI.ArcGIS.Geodatabase.IRaster _
  Or TypeOf geoDataset Is ESRI.ArcGIS.Geodatabase.IRasterDataset _
  Or TypeOf geoDataset Is ESRI.ArcGIS.DataSourcesRaster.IRasterBand _
  Or TypeOf geoDataset Is ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor) Then
    'Create the RasterMathOps object
    Dim trigOp As ESRI.ArcGIS.SpatialAnalyst.ITrigOp = New ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass
    ' Create the output raster object			
    Dim geoDataset_output As ESRI.ArcGIS.Geodatabase.IGeoDataset = trigOp.Tan(geoDataset)
    Return geoDataset_output
  Else
    'Invalid type of GeoDataset for this process
    Return Nothing
  End If
End Function