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

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

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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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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