anonymous
  • anonymous
A sound wave is modeled with the equation y= 1/4 cos 2pi/3 theta. A. Find the period. Explain your method. B. Find the amplitude. Explain your method. C. What is the equation of the midline? What does is represent?
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
\[y=\frac{ 1 }{ 4} \cos \frac{ 2\pi }{ 3 } \]theta
kropot72
  • kropot72
In the equation \[\large y=A \cos(Bx)\] the period T is given by \[\large T=\frac{2\pi}{B}\] and the amplitude is absolute value of A = |A| You need to plug the values into the above to find the values of the period and the amplitude.
kropot72
  • kropot72
In your equation \[\large B=\frac{2\pi}{3}\] and |A| = 1/4

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
So the period is T= 2pi/3 and the amplitude is 1/4?
kropot72
  • kropot72
The amplitude is 1/4. The period is given by \[\large T=\frac{2\pi}{\frac{2\pi}{3}}\]
anonymous
  • anonymous
So that's the period, the amplitude is 1/4. How do we find the midline cuz i have to show my work
kropot72
  • kropot72
\[\large T=\frac{2\pi}{\frac{2\pi}{3}}=\frac{2\pi}{1}\times\frac{3}{2\pi}=?\]
anonymous
  • anonymous
3?
kropot72
  • kropot72
Correct, the period is 3 units. There is no y-shift, therefore the equation of the midline is y = 0
kropot72
  • kropot72
The equation y = 0 is simply the x-axis.
anonymous
  • anonymous
How do we find the midline though? @kropot72
anonymous
  • anonymous
@UsukiDoll
anonymous
  • anonymous
@Astrophysics
kropot72
  • kropot72
As I posted previously "There is no y-shift, therefore the equation of the midline is y = 0" "The equation y = 0 is simply the x-axis."
kropot72
  • kropot72
|dw:1437193916695:dw|
kropot72
  • kropot72
@EllenJaz17 Do you need more explanation?
anonymous
  • anonymous
No thank you so much, sorry i was writing everything down
anonymous
  • anonymous
Once again thank you so much for your help, I gave you a medal
kropot72
  • kropot72
You're welcome :)
anonymous
  • anonymous
I hate trig
anonymous
  • anonymous
Yeah and this is supposed to be an Algebra class
anonymous
  • anonymous
That's stupid i didn't learn that crap until last year in pre-cal/trig

Looking for something else?

Not the answer you are looking for? Search for more explanations.