1. Show that 2. Express the following signals in terms of apparent frequencies: (a) cos(0.8πn + θ) (b) sin(1.2πn + θ) (c) cos(6.9n + θ) (d) cos(2.8πn + θ) + 2 sin(3.7πn + φ) (e) sinc(πn/2) (f)...

2. Express the following signals in terms of apparent frequencies:

(a) cos(0.8πn + θ)

(b) sin(1.2πn + θ)

(c) cos(6.9n + θ)

(d) cos(2.8πn + θ) + 2 sin(3.7πn + φ)

(e) sinc(πn/2)

(f) sinc(3πn/2)

(g) sinc(2πn)