V(t) = 120sin(120*pi*t)
V(t) = 120sin(377t)
377*t = The angle in radians.
B. Vmax=120sin(377*1/240)=120sin(90o)= 120 Volts.
C. Vmin=120sin(377*1/80)=120sin(270o)= -120 Volts.
D. 0, 1/120, and 1/60 Seconds.
E. 120sinA = 60
sinA = 60/120 = 0.5
A = 30o.
t=(30o/360o) * 1/60 = 1/360=0.00278 s.
A = 180-Ar = 180-30 = 150o
t = (150o/360o) * 1/60 = 0.00694 s.
F. 120sinA = 10
sinA = 0.08333
A = 4.78o
t = (4.78/360) * 1/60 = 0.00022 s.
A = 180-4.78 = 175.22o
t = (175.22/360) * 1/60 = 0.0081 s.
2pi*F = 377 Radians/s.
F = 377/2pi = 377/6.28 = 60 Hz
P = 1/60 Seconds. = The period.
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