# algebra 2

a sound wave is modeled with the equation y=1/4 cos 2pi/3 theta.

a.find the period.explain
b.find the amplitude.explain

1. 👍
2. 👎
3. 👁
1. y = A cos(kx) has
amplitude A
period 2pi/k

Now just plug in your numbers

1. 👍
2. 👎

## Similar Questions

1. ### math

Find all solutions to the equation tan(t)=1/tan (t) in the interval 0

2. ### Precalculus check answers help!

1.) Find an expression equivalent to sec theta sin theta cot theta csc theta. tan theta csc theta sec theta ~ sin theta 2.) Find an expression equivalent to cos theta/sin theta . tan theta cot theta ~ sec theta csc theta 3.)

3. ### calculus

Find complete length of curve r=a sin^3(theta/3). I have gone thus- (theta written as t) r^2= a^2 sin^6 t/3 and (dr/dt)^2=a^2 sin^4(t/3)cos^2(t/3) s=Int Sqrt[a^2 sin^6 t/3+a^2 sin^4(t/3)cos^2(t/3)]dt =a Int

4. ### trig

If sin theta is equal to 5/13 and theta is an angle in quadrant II find the value of cos theta, sec theta, tan theta, csc theta, cot theta.

1. ### Trigonometry

a. Find the exact value of sin (theta - pi/6) b. Find the exact value of cos (theta - pi/4) c. For what numbers x, -2pi less than or equal to x less than or equal to 2pi does cos x = -1 d. What is the range of the cosine function?

2. ### Calculus

f(theta)= 4sec(theta)+ 2tan(theta), 0 less than theta less than 2pi. find all critical numbers

3. ### Fluid Mechanics - The Complex Velocity potential f

Note : Let us combine a source of strength m at the origin with a uniform flow of velocity 𝑢 parallel to the positive x-axis. Then the complex velocity potential(w = -[velocity potential(pi)] - stream function(A)*i) is; 𝑤 =

4. ### Trig

Find two values of theta that satisfy the equation. give your answers in degrees (0degrees

1. ### physics

A ball is attached to a string with length of L. It swings in a horizontal circle, with a constant speed. The string makes an angle (theta) with the vertical, and T is the magnitude of the tension in the string. 1)Determine the

2. ### Calculus

Evaluate, in spherical coordinates, the triple integral of f(rho,theta,phi)=cos (phi) , over the region 3

3. ### Algebra2

The function f(theta) and g (theta) are sine functions where f(0)=g(0)=0. The amplitude of f (theta) is twice the amplitude of g(theta). The period of f(theta) is one-half the period of g(theta). If g (theta) has a period of 2pi

4. ### Maths

a) Express f(theta) = 4cos theta - 6sin theta in the form r cos(theta + alpha) b) Hence find the general solution of the equation 4cos theta - 6sin theta =5 c) Hence, find the minimum value of the function 1/4+f( theta)