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Chapter 5, Problem 5.27P

We have v 1 ( t ) = 10 cos ( ω t + 30 ° ) . The current i 1 ( t ) has an rms value of 5 A and leads v 1 ( t ) by 20 ° . (The current and the voltage have the same frequency.) Draw a phasor diagram showing the phasors. Write an expression for i 1 ( t ) of the form I m cos ( ω t + θ ) .

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