Question 1:

a + ib ac + bd + i(bc - ad) = c + id 2+ 2Is the relation (A f (x))/ f (x) = fl always obeyed? If not, give an example to support your conclusion. .d Because J-a cos(nix/d) cos(mux/d) dx = 0, m # n, the functions cos(nox/d ) for n = 1, 2, 3, ... form an orthogonal set in the interval (-d, d). What constant must these functions be multiplied by to form an orthonormal set