ASIN function

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 worksheet.

ShowHow to copy an example

  1. Create a blank workbook or worksheet.
  2. Select the example in the Help topic.

 Note   Do not select the row or column headers.

Selecting an example from Help

Selecting an example from Help
  1. Press CTRL+C.
  2. In the worksheet, select cell A1, and press CTRL+V.
  3. 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.
 
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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 2007