In **Microsoft Excel**, an **ASIN** is a **Math and Trigonometry function**, and its purpose is to return the arcsine or inverse of a number. The arcsine is the angle whose sine is a number.

The formula for the ASIN function is ASIN(number).

The syntax for the ASIN function is below:

**Number**: The sine of the angle you want must be from -1 to 1. It is required.

## How to use the ASIN function in Excel

Follow the steps below to use the Excel ASIN function:

- Launch Excel
- Enter data or use existing data.
- Enter a formula into the cell.
- Press Enter.
- See result.

Launch **Microsoft Excel**.

If you type the ratio 0.5 into the cell, then enter the formula in the cell you want to add the result*.*

Enter into the cell the formula *=ASIN(A2)*.

Then press *Enter*.

It will return the Radian *0.523599*.

If you type the formula as *=ASIN(A3)*180/PI()*. The result would be *30* degrees.

There are two other methods to use the ASIN function.

**Method one** is to click the *fx* button on the top left of the Excel worksheet.

An **Insert Function** dialog box will appear.

Inside the dialog box, in the section **Select a Category**, select * Math and Trigonometry *from the list box.

In the section **Select a Function**, choose the *ASIN *function from the list.

Then click *OK.*

*A ***Function Arguments*** dialog box will open.*

In the Number entry box, type cell A2.

Then click* OK.*

**Method two** is to click the **Formulas **tab and click the *Math and Trigonometry *button in the *Function Library* group.

Then select* ASIN* from the drop-down menu.

A **Function Arguments** dialog box will open.

Follow the same method in Method 1.

Then click *Ok*.

### Can Excel do trig functions?

Yes, Excel has built-in functions for trigonometric calculations. These functions include SIN, COS, TAN, ASIN, ACOS, and ATAN. You must enter the function name in a cell to use these functions, followed by the argument (the angle or number you want to evaluate).

**READ**: How to use the IMPRODUCT function in Excel

### What are math and trig functions in Excel?

Mathematical and trigonometric functions in Excel are built-in functions that allow you to perform calculations on numerical data in your spreadsheets. These functions help you automate everyday mathematical operations such as addition, subtraction, multiplication, division, rounding, etc.

**READ**: How to use the PI function in Excel

We hope this tutorial helps you understand how to use the ASIN function in Microsoft Excel.