Question: Sinus(degree) as a procedure?

I am trying to do a small procedure which converts an input of degrees into the sin function into its corresponding unit-circle value. I can get this to work. 

Sinus:= proc(g::unit)   
return evalf(sin(g*Pi/180));
end proc; 

 

but is there a more elegant way to do it? Using maybe Units package ? Thanks in advance :)

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