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What is the average power of i(t)cos(ωt)?
The average power of i(t) is:
1/T * ∫i^2 = G
The average power of i(t)cos(ωt) is
1/T * ∫i^2 cos^2 = ?
For some reason, it equals 1/2 * G, but I dont understand why.
Keep in mind that i(t) is not constant, so you can't just take it outside of the integral.
Say that the average power of a signal i(t) is G.
What is the average power of i(t)cos(ωt)?
I think it might be 0.5G, but I don't understand why.
Can you help please explain it?
Thank you.