In the circuit of Fig., with the switch in position 1, take L = 1, R = 10, and E(t) = 30 cos 60t + 40 sin 60t. (a) Substitute Isp(t) = A cos 60t + B sin 60t and then determine A and B to find the steady-state current Isp in the circuit. (b) Write the solution in the form Isp(t) = C cos(ωt − α).
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