Consider an AC circuit with voltage and current equations given as below: v(t) = 120 cos(377t + 45°) V i(t) = 10 cos(377t – 10°) A By applying trigonometric identity: 1 cosAcosB =[cos(A + B) + cos(A – B)] Find:

Consider an AC circuit with voltage and current equations given as below: v(t) = 120 cos(377t + 45°) V i(t) = 10 cos(377t – 10°) A By applying trigonometric identity: 1 cosAcosB =[cos(A + B) + cos(A – B)] Find:

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.7MCQ

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Consider an AC circuit with voltage and current equations given as below:
v(t) = 120 cos(377t + 45°) V
i(t) = 10 cos(377t – 10°) A
By applying trigonometric identity:
1
cosAcosB = (cos(A + B) + cos(A – B)]
Find:
i)
The instantaneous power expression, p(t)
ii) The amount of average power, Pave

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