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The function x = (9.5 m) cos[(6πrad/s)t + π/4 rad] gives the simple harmonic motion of...

The function x = (9.5 m) cos[(6πrad/s)t + π/4 rad] gives the simple harmonic motion of a body. At t = 2.3 s, what are the (a) displacement, (b) velocity, (c) acceleration, and (d) phase of the motion? Also, what are the (e) frequency and (f) period of the motion?

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