What is SEC function in Excel?
The SEC function is one of the math functions of Excel.
It returns the secant of an angle.
We can find this function in Math & trig category of insert function Tab.
How to use SEC function in excel
- Click on an empty cell (like F5 )

2. Click on the 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 SEC function
6. Then select ok

7. In the function arguments Tab you will see SEC function
8. Number section is the angle in radians for which you want the secant
9. You will see results in formula result section

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

sec(A2) ----->>>>answer is -1
sec(A3) ----->>>>answer is 1.414
sec(A4) ----->>>>answer is -1
sec(A5) ----->>>>answer is 2
sec(A6) ----->>>>answer is 1
What is the purpose of SEC function?
It returns the secant of an angle.
What is the Return value of SEC function?
It returns a positive number.
How many arguments does SEC function have?
This function has just 1 Argument.
The argument of SEC function is number.
Number section is the angle in radians for which you want the secant.
The argument of SEC function is required and not optional.
SEC(number) = number
Which version of excel supports SEC function?
This function is available for all excel versions (2003-2019)