A pendulum is swinging next to a wall. The distance D(t) (in cm) between the of the pendulum and the wall as a function of time t (in seconds) can be modeled by a sinusoidal expression of the form a * sin (b * t) + d

At t = 0, when the endulum is exactly in the middle of its swing, the bob is 5 cm away from the wall. The bob reaches the closest point to the wall, which is 3 cm from the wall, 1 second later.

Find D(t).
(T should be in radians)