Find a sinusoidal equivalent to 7.21 sin(wt) + 11.2 cos(wt)

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 2.10MCQ: The average value of a double-frequency sinusoid, sin2(t+), is given by (a) 1 (b) (c) Zero
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2.- Find a sinusoidal equivalent to
7.21 sin(wt) + 11.2 cos(wt)
Transcribed Image Text:2.- Find a sinusoidal equivalent to 7.21 sin(wt) + 11.2 cos(wt)
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Where does the -32.771 degrees angle come from in Step 2? I tried to do arctan(b/a), but is that not how you get it? Thank you.

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