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Mathematics 11 Online
OpenStudy (anonymous):

Domain and range of f(x)=-4cos2x?

OpenStudy (anonymous):

domain is all reals range is [-4,4]

OpenStudy (anonymous):

Thank you so much.

OpenStudy (anonymous):

yw

OpenStudy (anonymous):

range of cos is [-1, 1], you are vertically stretching the graph by multiplying it by |-4|, (also reflecting it across the x-axis, but not relevant to this question)

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