PHP asin() Function
 Complete PHP Math Reference
Definition and Usage
The asin() function returns the arcsine of a number as a numeric value between
-PI/2 and PI/2 radians.
Syntax
| Parameter |
Description |
| x |
Required. Must be a numeric value in the range -1 to 1 |
Tips and Notes
Note: If the parameter x is
outside the range -1 to 1, the browser will return -1.#IND.
Note: 1 will return the value
of PI/2.
Example
In this example we will get the arcsine of different numbers:
<?php
echo(asin(0.64) . "<br />");
echo(asin(0) . "<br />");
echo(asin(-1) . "<br />");
echo(asin(1) . "<br />");
echo(asin(2))
?>
|
The output of the code above will be:
0.694498265627
0
-1.57079632679
1.57079632679
-1.#IND
|
Complete PHP Math Reference
The Altova MissionKit is an integrated suite of tools ideal for:
- XML development
- Web & Web services development
- Data mapping & integration
- Rendering & publishing XML & database data
- XBRL validation, taxonomy editing, transformation & rendering
The MissionKit for XML Developers includes XMLSpy® - the industry-leading XML editor; MapForce® - a
graphical data mapping, conversion, and integration tool; StyleVision® - a visual XSLT stylesheet designer;
DiffDog® - an XML-aware diff/merge tool; and 2 additional tools.
Try all 6 products free for 30 days!
Download a fully-functional free trial
|
|
|
| 
