Question

Find the rms value of each of the following
periodic currents:
a. i(t) = cos 377t + cos 377t A
b. i(t) = cos 2t + sin 2t A
c. i(t) = cos 377t + 1A
d. i(t) = cos 2t + cos (2t+ 135) A
e. i(t) = cos 2t + cos 3t A

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