Question

Choose the function whose graph is given by:VAATA28+22O A. y=4cos(3x)O B. y=-4cos( 5 x)O C. y=4cos(2x)O D. y= Acos(4x)

Answer 1

We see that:

• the graph has the same shape as the graph of the cosine function,

,

• the amplitude of the graph is A = 4,

,

• the period of the function is T = π.

The function of the graph is:

`f(x)=4\cdot\cos (2x).`

Answer

C. y = 4 cos(2x)