Find the sum of two sinusoidal voltages, given as follows: V₁ (t)=V1 cos(wt+1) and v₂ (t)=V2 cos(wt+$2). You are told that V1=13, V2 = 21, w = 1,000, 1 68° and 2 = 44º. = Hint: we recommend using the phasor transform to add these signals in the frequency domain. Once you have added the signals, please enter the magnitude below.

Subject is Signals and Systems can you solve this problem please :)

Given the discrete-time sinusoid a (n) = 2cos(nn/2) + sin(3nt/4), ignoring the effects of aliasing, if this was due to sleeping rate F, = 70 Hz. What are the frequencies of the continuous time cosine and sine functions? O a. Cosine is 35.00 Hz, Sine is 52.50 Hz O b. Cosine is 23.33 Hz, Sine is 52.50 Hz O c. Cosine is 23.33 Hz, Sine is 46.67 Hz O d. Cosine is 35.00 Hz, Sine is 46.67 Hz O e. Cosine is 35.00 Hz, Sine is 105.00 Hz O f. Cosine is 23.33 Hz, Sine is 105.00 Hz

I am having trouble really understanding this problem and more specifically how to transform between steady state and the other versiong of wave forms