Available with Spatial Analyst license.

Available with Image Analyst license.

## Summary

Calculates the cosine of cells in a raster.

## Illustration

## Usage

In mathematics, all trigonometric functions have a defined range of valid input values, called the domain. The output values from each function also has a defined range. For this tool

The Domain is : -∞ < [in_value] < ∞

The Range is : -1 ≤ [out_value] ≤ 1

Note that -∞ and ∞ represent the smallest negative and largest positive value supported by the particular raster format, respectively.

The input values for this tool are interpreted to be in radians. If the input you want to use is in degrees, the values must first be divided by the radians-to-degrees conversion factor of 180/pi, or approximately 57.296.

For further assistance, a procedure to follow and examples of converting input values in degrees to radians are available.

The output values from this tool are interpreted as unitless.

Output values are always floating point, regardless of the input data type.

Due to the range of values, applying a linear stretch renderer can be useful to better see the results.

If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.

## Syntax

Cos(in_raster_or_constant)

Parameter | Explanation | Data Type |

in_raster_or_constant | The input for which to calculate the cosine values. To use a number as an input for this parameter, the cell size and extent must first be set in the environment. | Raster Layer; Constant |

#### Return Value

Name | Explanation | Data Type |

out_raster | The output raster. The values are the cosine of the input values. | Raster |

## Code sample

This example calculates the cosine of the values in the input Grid raster.

```
import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outCos = Cos("degs")
outCos.save("C:/iapyexamples/output/outcos")
```

This example calculates the cosine of the values in the input Grid raster and outputs a TIFF raster.

```
# Name: Cos_Ex_02.py
# Description: Calculates the cosine of pixels in a raster
# Requirements: Image Analyst Extension
# Import system modules
import arcpy
from arcpy import env
from arcpy.ia import *
# Set environment settings
env.workspace = "C:/iapyexamples/data"
# Set local variables
inRaster = "degs"
# Check out the ArcGIS Image Analyst extension license
arcpy.CheckOutExtension("ImageAnalyst")
# Execute Cos
outCos = Cos(inRaster)
# Save the output
outCos.save("C:/iapyexamples/output/outcos.tif")
```

## Environments

## Licensing information

- Basic: Requires Image Analyst or Spatial Analyst
- Standard: Requires Image Analyst or Spatial Analyst
- Advanced: Requires Image Analyst or Spatial Analyst