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)
Number is 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 spreadsheet.
How?- Create a blank spreadsheet.
- Select the example in the Help topic.
Selecting an example from Help
- Press CTRL+C.
- In the spreadsheet, select cell A1, and press CTRL+V.
- To switch between viewing the formula that returns the result and the result in the cell, select the cell and press F2 and then ENTER, or click Commands and Options on the spreadsheet toolbar, click the Formula tab, and look in the Formula in active cell (active cell) box.
| 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) |