Respuesta :

Hence function 's graph is option D .

What is Function Of cos?

Cos function is ration of adjacent side to hypotheses.

What is Range of Cos function ?

Range of function lies between [-1,1]

Cos x = 2 n [tex]\pi[/tex]

where x is angle

Hence option D where y=3cos ([tex]\frac{\pi }{2}[/tex]X) is function

Earn more about function of cos

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Answer: 3cos(4x)

Step-by-step explanation:

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