Per definition; cos(w' 2T) is always equal to one.
Why? There is no explanation to why it will always be one. How can w'2T always result into one? ( Attachment )

Question

Per definition; cos(w' 2T) is always equal to one.
Why? There is no explanation to why it will always be one. How can w'2T always result into one? ( Attachment )

anonymous · Answer

I asked the same question here ( http://openstudy.com/study#/updates/55e571ede4b03567e110d72b ) and got an answer; but realized that w is derived! How can a derived w' cancel out a w?

anonymous · Answer

w = root(k/m)

w' = root(k/m  -  b^2/4m^2)

Their values should not matter, as, according to previous answer (link in previous post) they should cancel eachother out; resulting into an cos(n*2pi) value resulting into it always becoming = 1