# ASIN function: Description, Usage, Syntax, Examples and Explanation

## What is ASIN function in Excel?

ASIN function is one of the Math and Trig functions in Microsoft Excel that returns the arcsine, or inverse sine, of a number. The arcsine is the angle whose sine is number. The returned angle is given in radians in the range -pi/2 to pi/2.

## Syntax of ASIN function

ASIN(number)

The ASIN function syntax has the following arguments:

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

## ASIN formula explanation

To express the arcsine in degrees, multiply the result by 180/PI( ) or use the DEGREES function.

## Example of ASIN function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

Formula |
Description |
Result |

=ASIN(-0.5) | Arcsine of -0.5 in radians, -pi/6 | -0.523598776 |

=ASIN(-0.5)*180/PI() | Arcsine of -0.5 in degrees | -30 |

=DEGREES(ASIN(-0.5)) | Arcsine of -0.5 in degrees | -30 |