A sound wave is modeled with the equation y= 1/4 cos2pi/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 it represent?

a) Period: 2pi/b 3 units
T= 2pi/2pi/3 = 2pi/1 *3/2pi = 3

b) ¼ The amplitude is the multiplier in the beginning of the equation.

c) y=0 there is no y-shift and it represents the neutral positio.

Are my answers correct?

1 answer

I agree with your answers