# COS

Formulas / COS
Calculate the cosine of an angle.
`=COS(number)`
• number - angle in radians

## Examples

• `=COS(PI()/6)`

The COS function can be used to calculate the cosine of an angle given in radians. For example, the formula returns the cosine of 30 degrees, which is 0.886.

• `=COS(60*PI()/180)`

The COS function can also be used to calculate the cosine of an angle given in degrees. The formula returns the cosine of 60 degrees.

• `=COS(RADIANS(60))`

If the angle is given in degrees, the RADIANS function can be used to convert it to radians before using it with the COS function. The formula returns the cosine of 60 degrees.

## Summary

The COS function can be used to calculate the cosine of an angle in radians. To use COS with degrees, the angle must be multiplied by PI()/180.

• The COS function takes a radian angle argument.
• The COS function returns the cosine of an angle, which is a numerical value.

What is the COS function and how does it work?
The COS function returns the cosine of an angle. The angle is measured in radians and is calculated using the formula COS(number). The number argument is a required angle in radians. To convert from degrees to radians, use either PI()/180 or RADIANS.
What is the format for the COS function?
The format for the COS function is COS(number). The number argument is the required angle in radians.
How can I convert from degrees to radians?
You can convert from degrees to radians by using either PI()/180 or RADIANS.

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