Question: A current source in a linear circuit has i s = 15 cos (25 t + 25) A (a) What is the amplitude of

A current source in a linear circuit has 

is = 15 cos (25 π t + 25°) A

(a) What is the amplitude of the current?
(b) What is the angular frequency?
(c) Find the frequency of the current.
(d) Calculate is at t = 2 ms.

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