Hi,
I am struggling to understand the maths in the text shown below.
(1) How does: r(t) = Acos(wt)+Bsin(wt)
become; sqrt((A^2)+(B^2))cos(wt - arctan(B/A))?
(2) He states that we can represent the input as a phasor and in one of three ways but doesn't say which one.
(3) He then focus on the...