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## Homework Statement

An LC circuit constructed of a 1 microF capacitor and a 1 microH inductor

is set in oscillation so that the charge on the capacitor is 1.0 microC at t = 0

and 2.0 microC at t = 1.57 x 10^-6 s. What is the charge on the capacitor at

t = 1.0 s?

## Homework Equations

Q(t) = Q

_{0}cos(wt), w = angular frequency = 1 / sqrt(LC), L = inductance

## The Attempt at a Solution

At first glance, it seemed like a simple plugin problem using t = 1.0 s and Q

_{0}= 1.0 microC in the equation..

but i'm not sure why the problem tells me the charge at t = 1.57 x 10^-6 s

is this just extra unrelated information? or is my method incorrect?