The Displacement from Equilibrium of an Oscillating Weight Suspended by a Spring

Multiple Choice

The displacement from equilibrium of an oscillating weight suspended by a spring and subject to the damping effect of friction is given by
$y = 2 e ^ { - t } \cos 6 t$ where y is the displacement in centimeters and t is the time in seconds (see figure) .Find the displacement when $t = \frac { 1 } { 6 }$ .(Round your answer two decimal places.)

A) 0.71 cm
B) 1.11 cm
C) 1.31 cm
D) -0.91 cm
E) 0.91 cm