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Problem 1 - Given the sinuosidal voltage v(t) = 50 cos(30t+10o) V, find: (a) the amplitude Vm (b) the period T, (c) the frequency f and (d) v(t) at t = 10 ms.

Problem 2 - A current source in a linear circuit has - is = 15 cos(25πt + 25o) A

(a) What is the amplitude of the current?

(b) What is the angular frequency?

(c) Find the frequency of the current.

(d) Calculate is at t = 2 ms.

Problem 3 - Express the following functions in cosine form:

(a) 10 sin(ωt + 30o)

(b) -9sin(8t)

(c) -20sin(ωt + 45o))

Problem 4 - Given v1 = 45 sin(ωt + 30o) V and v2 = 50 cos(ωt - 30o V), determine the phase angle between the two sinusoids and which one lags the other.

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