Looker Studio Function: COS
Category: Arithmetic function
The COS function in Looker Studio is a powerful mathematical function that calculates the cosine of a given angle (in radians). It is mainly used in data distribution analysis, customer segmentation, and strategic decision-making, especially when working with periodic or cyclical patterns.
Purpose of the COS Function
1. Data Distribution Analysis :
The COS function can be applied to study cyclical data patterns such as sales seasonality or traffic fluctuations. It helps visualize how data points vary over time and can uncover hidden trends in time-based datasets.
2. Customer Segmentation :
By integrating COS into behavioral data, businesses can identify recurring patterns in customer activity. This supports deeper segmentation by highlighting cyclical purchasing or engagement trends across customer groups.
3. Decision Making :
When used alongside key business metrics, COS offers a mathematical basis for understanding patterns. It helps decision-makers align strategies with predictable cycles, improving timing in marketing or resource allocation.
Type of Calculation:
| Use Case | Description |
|---|---|
| Performance Benchmark | Use COS to analyze fluctuations in performance metrics across time periods.. |
| Customer Segmentation | Identify patterns in behavior, such as recurring purchases or activity. |
| Time Series Analysis | Highlight and model cyclical behavior using the COS function. |
COS(number)
| Parameter | Type | Description |
|---|---|---|
| Number | numeric | The angle (in radians) to get the cosine of. |
How Does the COS Function Work?
The COS function computes the cosine value of an angle in radians, not degrees. It runs a trigonometric calculation and returns a value between -1 and 1. It’s useful when working with periodic datasets or modeling curves like seasonality.
When Should You Use COS?
Use COS when you:
To analyze cyclical trends in time series data
To identify behavioral patterns over time
To smooth fluctuations in data for forecasting
Example of COS with Result
Example 1: Basic Usage
Example 2: Column Usage
COS(${orders.time_in_radians})
Example 3: Handling Decimals and Scientific Notation
Looker Studio handles decimal and scientific notation natively, so COS will accurately compute results even with very small or large numbers.
Example 4: Combining with Other Functions
ABS(COS(${seasonal_angle}))
Tips and Tricks
Convert degrees to radians using
RADIANS()before passing toCOS.Normalize time data (e.g., month-to-angle) to reveal patterns.
Combine
COSwithSINto map two-dimensional trends.Use in custom fields for time-series dashboards.
Pair with
IFconditions for smarter logic-driven outputs.
It returns the cosine of a given angle (in radians), a value between -1 and 1.
Yes, but convert your date or time to radians first to use it effectively in time series analysis.
Both are trigonometric functions. COS measures the horizontal component, while SIN measures the vertical.
Absolutely. COS can model recurring cycles in sales, traffic, or any other periodic dataset.
Yes. You can nest it within other functions like IF, ROUND, or ABS.