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came across this simple problem: Let w = 2000 rad/s and t = 1 ms. Find the instantaneous value of each of the currents given here in phasor form: a) j10 A; b) 20 + j10 A

so for part a, I changed the current (0 + j10) to 10e^0 or simply 10, then my instantaneous value should be 10cos(wt + phi) = 10cos(2+0) = -4.16 A but the answer in the book is -9.09 A. Did I do this right?

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# Homework Help: Phasor physics problem

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