The change in pressure P on an eardrum from a pure tone at time t is given by the equation...

The change in pressure P on an eardrum from a pure tone at time t is given by the equation: P(t) = 0.001 sin(l882πt + (π/4)), where t is expressed in seconds, and P is in pounds per square foot. Find P to the nearest thousandth of a pound for the following times t. t = 6.5