Grasshopper

algorithmic modeling for Rhino

A very simple question which I don't understand:

 

 

I have a "cos" item and use number set as 30 for input

but why the out put shows as 0.154?

 

Cos(30) should be 0.866

 

Noppon

 

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Is that because GH uses radians rather than degrees?
Is there a way to use degree instead of radians?
Figured out .......  cos(rad(x))
Yes, you can also use 30°
or type 30º (Alt+0186), you'll have to paste it in from notepad or something like that. See Davids comments on: http://www.grasshopper3d.com/forum/topics/degrees-to-radians

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