# COS

## Y ## Understanding the COS Function

The COS function is a mathematical function that calculates the cosine of a given angle. The cosine is a trigonometric function that represents the ratio of the adjacent side to the hypotenuse of a right-angled triangle. In simpler terms, the COS function is used to find the value of the adjacent side of a right-angled triangle when the hypotenuse and angle are known.

In Power BI, the COS function is used to calculate the cosine of a given angle. The angle can be entered in radians or degrees, depending on the requirement. The result of the COS function is a decimal value between -1 and 1.

## Using the COS Function in Power BI

To use the COS function in Power BI, you need to follow these steps:

1. Open Power BI and create a new report or open an existing report where you want to use the COS function.

2. Click on the “New Measure” button in the “Modelling” tab of the ribbon.

3. In the formula bar, enter the following formula:

`Cosine = COS(❰angle❱)`

Replace `❰angle❱` with the value of the angle for which you want to calculate the cosine. You can enter the angle in radians or degrees, depending on your requirement.

4. Press Enter to create the measure.

5. Once the measure is created, you can use it in your report to calculate the cosine of the angle.

## Examples of Using the COS Function in Power BI

Let’s look at some examples of using the COS function in Power BI:

### Example 1: Calculating the Cosine of an Angle in Degrees

Suppose you have a dataset that contains the angles of a triangle in degrees. You want to calculate the cosine of each angle and display it in a table. Here’s how you can do it:

1. Create a new measure using the following formula:

The RADIANS function is used to convert the angle from degrees to radians, which is required by the COS function.

2. Create a table visual and add the “Angle” and “Cosine” measures to it.

You will see the cosine of each angle displayed in the table.

### Example 2: Creating a Sine Wave Chart

Suppose you want to create a chart that displays a sine wave. You can use the COS function to calculate the y-axis values for the chart. Here’s how you can do it:

1. Create a new table with a column “x” that contains a series of numbers.

2. Create a new measure using the following formula:

`y = COS([x])`

This formula calculates the cosine of each value in the “x” column.

3. Create a line chart and add the “x” and “y” measures to it.

You will see a sine wave chart displayed in the chart.

The COS function is a useful function in Power BI that can be used to calculate the cosine of a given angle. It can be used in a variety of scenarios, such as calculating trigonometric functions, creating charts, and more. By following the steps outlined in this article, you can easily use the COS function in your Power BI reports and gain valuable insights from your data.

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