Formulas regarding trigonometric function

[526996629]

I have some formulas which will need the use of trigonometric function. The image shows an example of what I met. Does anyone know why it's showing inconsistent units?

[İsmail_Özev · Accepted solution]

At the end of the formula, multiple with 1 cm if you want to get length result

[barthbradley · Accepted solution]

Seen this? 

https://www.revitforum.org/node/1126

Keep it handy to reference. I do.  

Neutralize 'em: 

https://knowledge.autodesk.com/support/revit/troubleshooting/caas/sfdcarticles/sfdcarticles/Inconsis...

[ToanDN · Accepted solution]

Sin(A1) is a Number, not a Length. Change your parameter to Number or change the formula to Sin(A1) * [a Length].