Thursday, June 22, 2023

Explain the Number Function ' COS ' in Tableau with Example?

In Tableau, the COS function is a number function that calculates the cosine of a given angle. The cosine is a trigonometric function that relates the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

The syntax for the COS function in Tableau is as follows:

  • angle is the angle in radians for which you want to calculate the cosine.

Here's an example to illustrate the usage of the COS function in Tableau:

Suppose you have a dataset with a column called "Angle" that contains different angle values in radians.


To calculate the cosine of the "Angle" column using the COS function, you can create a calculated field in Tableau:

  1. Right-click on a blank area in the "Data" pane in Tableau.
  2. Select "Create Calculated Field."
  3. In the formula editor, enter the following expression:

  1. Click "OK" to create the calculated field.

The calculated field, which utilizes the COS function, will calculate the cosine for each value in the "Angle" column.

The resulting dataset will be as follows:


In this example, the COS function calculates the cosine for each angle value in the "Angle" column. For instance, the cosine of 0.0 radians is 1.0, the cosine of 1.2 radians is approximately 0.3624, and so on.

The COS function is particularly useful in scenarios involving trigonometry or geometry, where you need to calculate ratios based on angle values. By utilizing the COS function in Tableau, you can perform these calculations and analyze data involving cosine values and their corresponding angles. 

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