Question

State the amplitude, period, phase shift, and vertical shift of the function m(t)= 7 cos (t+3)

Answer 1

B

Explanation:

I took the test

Answer 2

B

Explanation:

Given a sinusoidal function in the form
`f(x)=Acos(Bx+C)+D`, we can say:

• A is the amplitude
• 
  `(2\pi)/(B)` is the period
• 
  `-(C)/(B)` is the phase shift
• D is the vertical shift

From the function given m(t) = 7 Cos (t+3), we see that

A = 7

B = 1

C = 3

D = 0

Thus, from the info, we can say

Amplitude = 7

Period = 2π

Phase Shift = -3

Vertical Shift = 0

Answer choice B is right.