Question: 9 . 1 9 Using phasors, find: ( a ) 3 c o s ( 2 0 t + 1 0 ) - 5 c

9.19 Using phasors, find:
(a)3cos(20t+10)-5cos(20t-30)
(b)40sin50t+30cos(50t-45)
(c)20sin400t+10cos(400t+60)
-5sin(400t-20)
9 . 1 9 Using phasors, find: ( a ) 3 c o s ( 2 0

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