# ACOT

The `ACOT` function returns the inverse cotangent (arccot) of a number in radians. It is the opposite of the `COT` function, which takes an angle and returns its cotangent. The function is used in trigonometry to find the angle whose cotangent is a given number.

## Usage

Use the `ACOT` formula with the syntax shown below, it has 1 required parameter:

Parameters:
1. value (required):
The numerical value for which to calculate the inverse cotangent. Must be a real number.

## Examples

Here are a few example use cases that explain how to use the `ACOT` formula in Google Sheets.

### Calculate the angle from a cotangent value

Given the cotangent of an angle, use the `ACOT` function to find the angle in radians.

### Calculate the phase angle in an AC circuit

In alternating current (AC) circuits, the phase angle is the difference between the voltage and current waveforms. Use the `ACOT` function to calculate the phase angle of a circuit.

### Calculate the bearing angle between two points

When given the coordinates of two points on a map, use the `ACOT` function to calculate the bearing angle between them. This can help with navigation or calculating distances.

## Common Mistakes

`ACOT` not working? Here are some common mistakes people make when using the `ACOT` Google Sheets Formula:

### Using a non-numeric argument

The ACOT function only accepts numeric arguments. If you provide a non-numeric argument, such as text or a cell containing text, the function will return a #VALUE! error.

### Providing a value outside the domain of the function

The domain of the ACOT function is (-∞,-1) U (1,∞). If you provide a value outside this range, the function will return a #NUM! error.

The following functions are similar to `ACOT` or are often used with it in a formula:

• `COT`

The `COT` function returns the cotangent of an angle specified in radians. The cotangent is the ratio of the adjacent side of a right-angled triangle to the opposite side, and is the reciprocal of the tangent.

• `ATAN`

The `ATAN` function returns the arctangent of a value in radians, which is the angle whose tangent is a given value. This function is commonly used in trigonometry and geometry to calculate angles. The returned angle is in the range -π/2 to π/2.

• `ASIN`

The ASIN function returns the arcsine of a value in radians, which is the angle whose sine is the specified value. This function is commonly used in trigonometry and geometry calculations. When used in a formula, the ASIN function takes a single argument, the value for which to calculate the arcsine.

• `ACOS`

The `ACOS` function returns the arccosine of a value, which is the angle in radians whose cosine is the specified value. The function is often used in trigonometry to find the angle of a right triangle given the adjacent and hypotenuse. The value parameter must be a number between -1 and 1.

You can learn more about the `ACOT` Google Sheets function on Google Support.