Question

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 ...

Answer 1

I think you miss x after 2pi/3, right?

Answer 2

no there is a weird circle after it

Answer 3

u missed x after 2pi/3 right??

Answer 4

yea u did

Answer 5

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

Answer 6

oh im sorry im only 12

Answer 7

ok, if you don't have x, then it is a point on a graph, no amplitude, no period.

Answer 8

Suppose there is x there. I meant the function is \(y =(1/4) cos (2\pi/3) x\)

Answer 9

amplitude is 1/4

Answer 10

yes what he said im onlt 12

Answer 11

Is this the equation?
\[\large \frac{1}{4}\cos \frac{2 \pi}{3} \theta\]

Answer 12

yeah

Answer 13

The period is given by:
\[\large T=\frac{2 \pi}{\frac{2 \pi}{3}}=3\]

Answer 14

thanks!

Answer 15

You're welcome :)