The time average of some function Æ’(t) taken over an interval T is given by

where t' is just a dummy variable. If τ = 2π/ω is the period of a harmonic function, show that vector r.

and

when T = Ï„ and when T > > Ï„.

Transcribed Image Text:

ri+T f(t') dt' (f(t))T (sin² (K ·F – wt)) =} |(cos (K·i - ot)) = }