Answer :

Function y=cosx

For the given function:

Phase shift: how fat the function is shifted horizontally from the ussual position: In y=cosx the first wave goes to minimum in π and in the given graph in π/2.

Phase shifth:

[tex]\pi-\frac{\pi}{2}=\frac{\pi}{2}[/tex]

Midline: In y=cosx the midline is y=0.

In the given graph the midline is in y=1

Period: Measure from one peak to next.

Period: π

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