Q6

Which of the following functions does not describe simple harmonic motion?

A. $x=\cos^2t-\sin 2t$
B. $x=\sin 4t+4\cos 2t$
C. $x=2\sin 3t-4\cos 3t+5$
D. $x=4\cos\left(2t+\frac\pi2\right)+5\sin\left(2t-\frac\pi4\right)$