Homework Statement
Using trig identities from a calculus book or other, write out the results to the following modulations. State which frequencies exist in the signal s(t).
Homework Equations
a) s(t) = Acos(2∏f₁t) * Bcos(2∏f₂t)The Attempt at a Solution
cos(s) * cos(t) = cos (s + t)/2 + cos (s...