I want to take the derivative of my function, which I defined as
v[t_] := -tSin[t] - 3 t^2 + 5 t
so I type
and I get
5 - 6 t -tSin'[t].
I'm fine with the portion 5-6t, I would like to know why I cant get the actual derivative instead of -tSin'[t].
is there a way to get it using Mathematica? or should I just do that part by hand?