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4. Using phasors, find: (a) 3 cos(20t + 10°) - 5 cos(20t - 30°) (b) 40 sin 50t+30 cos(50t - 45°) (c) 20 sin 400t + 10 cos(400t + 60°) -5 sin(400t - 20°)

4. Using phasors, find: (a) 3 cos(20t + 10°) - 5 cos(20t - 30°) (b) 40 sin 50t+30 cos(50t - 45°) (c) 20 sin 400t + 10 cos(400t + 60°) -5 sin(400t - 20°)

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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4. Using phasors, find: (a) 3 cos(20t + 10°) - 5 cos(20t – 30°) (b) 40 sin 50t + 30 cos(50t - 45°) (c) 20 sin 400t + 10 cos(400t + 60°) -5 sin(400t - 20°)
Transcribed Image Text:4. Using phasors, find: (a) 3 cos(20t + 10°) - 5 cos(20t – 30°) (b) 40 sin 50t + 30 cos(50t - 45°) (c) 20 sin 400t + 10 cos(400t + 60°) -5 sin(400t - 20°)
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