The function of time representing a simple harmonic motion with a period of \( \frac{\pi}{\omega....

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The function of time representing a simple harmonic motion with a period of \( \frac{\pi}{\omega} \) is:
P
(1) \( \cos (\omega t)+\cos (2 \omega t)+\cos (3 \omega t) \)
(2) \( \sin ^{2}(\omega t) \)
(3) \( \sin (\omega t)+\cos (\omega t) \)
(4) \( 3 \cos \left(\frac{\pi}{4}-2 \omega t\right) \)


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