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For a full list of available calculation functions, please read What calculation functions are supported.
This article describes the formula syntax and usage of the COS function.
Description
Returns the cosine of a given angle. The angle is measured in radians.
Syntax
COS(angle)
The COS function syntax has the following argument:
- angle - Required. The angle in radians for which you want the cosine value.
Remarks
- If the argument is not a valid number, COS returns the #VALUE! error value.
- To convert degrees to radians, multiply the degree value by PI()/180 or use the RADIANS function.
Example
| Formula | Description | Result |
| =COS(0) | Returns the cosine of 0 radians. | 1 |
| =COS(PI()/2) | Returns the cosine of 90 degrees (PI()/2 radians). | 0 |
| =COS(PI()) | Returns the cosine of 180 degrees (PI() radians). | -1 |
Errors
For a full list of formula errors, please read Formula errors.