# Can a simple pendulum be considered a simple harmonic oscillator?

Is the motion of a simple pendulum, a simple harmonic motion? It stops vibrating after sometime.

$y(\theta) = A\sin \theta+ B \cos \theta$ is known as the simple harmonic function. All the motions which can be represented by this function are known as simple harmonic motions.
• I'd prefer $y(t)=A\cos(\omega t + \phi )$ – Bernhard Mar 13 '13 at 13:49