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September 23, 2014

September 23, 2014

Posted by **Anonymous** on Sunday, November 4, 2007 at 11:02pm.

d(t) = 2.5 sin0.166 pi (t - 1.5) + 13.4

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Answer - 12.2

- Math - What is the period? -
**drwls**, Sunday, November 4, 2007 at 11:31pmThe variable following the sine function tells you the frequency f. Forget the -1.5 term -- that is just a phase angle.

2 pi f t = 0.166 pi t

(When f*t incresaes by 1, the phase changes by 2 pi)

Therefore 2f = 0.166

f = 0.083 s^-1

P = 1/f = 1/0.083 = 12.0 s

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