﻿ ASIN function

# ASIN function

This article describes the formula syntax and usage of the ASINfunction in Microsoft Excel.

## Description

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

ASIN(number)

The ASIN function syntax has the following arguments:

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

## Remark

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

## Example

The example may be easier to understand if you copy it to a blank worksheet.

How do I copy an example?

1. Select the example in this article.

Important   Do not select the row or column headers.

Selecting an example from Help

2. Press CTRL+C.

3. In Excel, create a blank workbook or worksheet.

4. In the worksheet, select cell A1, and press CTRL+V.

Important   For the example to work properly, you must paste it into cell A1 of the worksheet.

5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

After you copy the example to a blank worksheet, you can adapt it to suit your needs.

 1 2 3 4
 A B Formula Description (Result) =ASIN(-0.5) Arcsine of -0.5 in radians, -pi/6 (-0.5236) =ASIN(-0.5)*180/PI() Arcsine of -0.5 in degrees (-30) =DEGREES(ASIN(-0.5)) Arcsine of -0.5 in degrees (-30)

Applies To: Excel 2010, Excel Starter, Excel Online, SharePoint Online

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