anonymous
  • anonymous
a sound wave is modeled with the equation y = 1/4 cos 2(pi)/3 (then some weird zero with a line through it)... find the period and amplitude ...
Mathematics
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anonymous
  • anonymous
a sound wave is modeled with the equation y = 1/4 cos 2(pi)/3 (then some weird zero with a line through it)... find the period and amplitude ...
Mathematics
schrodinger
  • schrodinger
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Loser66
  • Loser66
I think you miss x after 2pi/3, right?
anonymous
  • anonymous
no there is a weird circle after it
anonymous
  • anonymous
u missed x after 2pi/3 right??

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anonymous
  • anonymous
yea u did
anonymous
  • anonymous
there isn't an x on it, but I guess include the x if needed to solve it :/ i just want to know how to answer it
anonymous
  • anonymous
oh im sorry im only 12
Loser66
  • Loser66
ok, if you don't have x, then it is a point on a graph, no amplitude, no period.
Loser66
  • Loser66
Suppose there is x there. I meant the function is \(y =(1/4) cos (2\pi/3) x\)
Loser66
  • Loser66
amplitude is 1/4
anonymous
  • anonymous
yes what he said im onlt 12
kropot72
  • kropot72
Is this the equation? \[\large \frac{1}{4}\cos \frac{2 \pi}{3} \theta\]
anonymous
  • anonymous
yeah
kropot72
  • kropot72
The period is given by: \[\large T=\frac{2 \pi}{\frac{2 \pi}{3}}=3\]
anonymous
  • anonymous
thanks!
kropot72
  • kropot72
You're welcome :)

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