# COT

The COT function in Excel is used to return the cotangent of an angle, given in radians.

## Syntax

=COT(`number`

)

`number` | The angle in radians for which you want to find the cotangent. |

## About COT

When you need to find the cotangent of an angle expressed in radians, you can rely on the COT function in Excel. It operates by taking an input angle in radians and producing the cotangent of that angle as the output. This function is particularly valuable in trigonometric calculations and analyses involving angles and their respective cotangents.

To use the COT function, you simply provide the angle in radians as the input. The function then evaluates the cotangent of this angle and returns the result, which represents the ratio of the adjacent side to the opposite side in a right-angled triangle formed by the angle.

A key aspect of the COT function lies in its ability to swiftly and accurately calculate the cotangent value, eliminating the need for manual trigonometric computations. Whether you're working on geometric, engineering, or scientific tasks, the COT function serves as a reliable tool for swiftly obtaining cotangent values with minimal effort and maximum precision.

## Examples

If you want to find the cotangent of an angle in radians, such as π/4 (which is equivalent to 45 degrees), you can use the COT function as follows:

=COT(PI()/4)

This will return the cotangent value of the angle π/4.

## Questions

**Can the COT function accept angles in degrees?**

No, the COT function only accepts angles in radians. If you have an angle in degrees, you will need to convert it to radians using the RADIANS function before using it with the COT function.

**What does the output of the COT function represent?**

The output of the COT function represents the cotangent of the input angle. In the context of a right-angled triangle formed by the angle, the cotangent signifies the ratio of the length of the adjacent side to the length of the opposite side.

## Related functions

TAN

SIN

COS

ATAN

ATAN2