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Which of the following functions stretch...

Which of the following functions stretches `y=cos(x)` vertically by a factor of 3?

A

`y=cos(x+3)`

B

`y=cos(3x)`

C

`y=cos((1)/(3)x)`

D

`y=3cosx`

Text Solution

Verified by Experts

Vertical stretching is accomplished by multiplying the function by the stretching factor after the function is applied.
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