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  3. a. 1 1 cos(x)cos(y) = -cos(x-y) + -cos(x + y) 1 l

a. 1 1 cos(x)cos(y) = -cos(x-y) + -cos(x + y) 1 l sin(x)sin(y) = -cos(x-y)--cos(x+ y)...

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Advance Math

a. 1 1 cos(x)cos(y) = -cos(x-y) + -cos(x + y) 1 lsin(x)sin(y) = -cos(x-y)--cos(x+ y) 1 l sin(x)cos(y) =—sin(x-y)+-sin(x + y) A DSB-FC (double sideband-full carrier) signal s(t) isgiven by, s(t) = n cos(2rr/cf)+ cos(2«-/mt)cos(2«-fct) What is thenumeric value for the AM index of modulation, m, fors(f) ?

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