What is the ACOT function in Excel?
The ACOT function is one of the math functions of Excel.
It returns the arccotangent of a number, in radians in the range 0 to Pi. The domain of arccosine is the interval [−R,+R].
We can find this function in Math&trig of insert function Tab.
How to use ACOT function in excel
- Click on an empty cell (like F5).

2. Click on fx icon (or press shift+F3).

3. In the insert function tab you will see all functions.

4. Select math and trig category.
5. Select the ACOT function.
6. Then select ok.

7. In the function arguments Tab you will see ACOT function.
8. In the Number section you can enter the cotangent of the angle you want.
9. You will see the result in the formula result section ( ACOT (0)=1.57).

Examples of ACOT function in excel
Example 1:
How to use ACOT function in excel
You can see examples of ACOT function below:

acot(-1) ----->>>>answer is 2.356
acot(-0.5) ----->>>>answer is 2.034
acot(0) ----->>>>answer is 1.570
acot(0.5) ----->>>>answer is 1.107
acot(1) ----->>>>answer is 0.785
math.acot(a)
How to plot Y=ACOT(X) with python code in excel
we can use Python code for ACOT function in excel:
import math
import numpy as np
import matplotlib.pyplot as plt
x =np.linspace(0,3.14,100)
lenx=len(x)
y=[]
for i in range(lenx):
y.append(math.acot(x[i]))
i +=1
plt.plot(x,y)
plt.show()
What is the purpose of ACOT function?
It returns the arccotangent of a number, in radians in the range 0 to Pi. The domain of arccosine is the interval [−R,+R].
What is the Return value of ACOT function?
It returns a number.
How many arguments does ACOT function have?
This function has just 1 Argument.
The argument of ACOT function is number.
In the Number section you can enter the cotangent of the angle you want.
The argument of ACOT function is required and not optional.
ACOT(number) = number
Which version of excel supports ACOT function?
This function is available for all excel versions (2003-2019).