Solve.In the study of alternating electric current, capacitive voltage is given by 
, where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 
Arccos (- 
)
B. t = 2?f cos (- 
)
C. t = 2?f Arccos (- 
)
D. t = 
Arccos (
)
Answer: A
Mathematics
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A. - 
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