# Anyone know what this formula does?

**URL:** <https://forum.kirupa.com/t/anyone-know-what-this-formula-does/243930>\
**Category:** flash\
**Created:** [November 12, 2007, 6:28pm UTC](https://forum.kirupa.com/t/anyone-know-what-this-formula-does/243930 "2007-11-12T18:28:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kneural](https://avatars.discourse-cdn.com/v4/letter/k/50afbb/32.png) [@kneural](https://forum.kirupa.com/u/kneural)\
**Post date:** [November 12, 2007, 6:28pm UTC](https://forum.kirupa.com/t/anyone-know-what-this-formula-does/243930/1 "2007-11-12T18:28:44Z")

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hi guys, im currently trying to figure out a formula which i got from [http://levitated.net/daily/levRotationalTG.html](http://levitated.net/daily/levRotationalTG.html)

In the script they have this formula

var rbit:Number = Math.sin(Math.PI/180 \* theta);  
var rbit90:Number = Math.sin(Math.PI/180 \* (theta - 90));

Can anyone explain to me how does that work? or what does this formula do??

thank you so much