The displacement \( X \) is meter of particle in a wave is related to time \( \mathrm{t} \) in s....

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The displacement \( X \) is meter of particle in a wave is related to time \( \mathrm{t} \) in second as \( x=0.01 \)
P
\( \cos \left(\pi t+\frac{\pi}{4}\right) \). What is the frequency of the motion?
W
(1) \( \pi \mathrm{Hz} \)
(2) \( \frac{\pi}{2} \mathrm{~Hz} \)
(3) \( 1.0 \mathrm{~Hz} \)
(4) \( 0.5 \mathrm{~Hz} \)


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