Fourier Coefficients
	q Because of the orthogonal property of cosine and sine function, all the coefficients A and B can be computed independently (you don’t need to know other Ai=2,3,…N/2 or Bi=1, 2, 3…N/2 in order to get A1, for example). q This is a multiple regression case. Using least-square fit, we can show that:                                                       For k=1,N/2
		(no BN/2 component)