(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The voltage V in an electrical outlet is given as a function of time, t, by the function V = V0 cos(120πt), where V is in volts and t is in seconds, and V0 is a positive constant representing the maximum voltage.

(a) What is the average value of the voltage over 3 seconds?

(b) Engineers do not use the average voltage. They use the root mean square voltage defined by V = √avg of V^2. Find V in terms of V0. (Take the average over 3 seconds.)

(c) The standard voltage in an American house is 110 volts, meaning that V = 110. What is V0?

the V0 is really V_o. and that is pi up there.

any help is appreciated. this is my set up:

(V_o)/3 [sin(120 pi t)/(120pi)][0 to 3]

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# Average value of a function and such.

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