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Mathematics 20 Online
OpenStudy (ohohaye):

Is this right!?!

OpenStudy (ohohaye):

OpenStudy (anonymous):

Nope

OpenStudy (rational):

definitely not C or D because the midline is x axis in the graph

OpenStudy (anonymous):

Would you say that looks more like a cos function or a tan function?

OpenStudy (ohohaye):

Cos for sure

OpenStudy (anonymous):

yep

OpenStudy (anonymous):

The 3 before the cos in y=3cos(4x) stretches the function vertically which is why it ranges from -3 to 3 instead of -1 to 1

OpenStudy (anonymous):

and cos(4x) has the inverse effect where is compressed by a factor of 4

OpenStudy (ohohaye):

Oh ok

OpenStudy (anonymous):

*in the x-axis

OpenStudy (ohohaye):

So it would be the second one?

OpenStudy (anonymous):

correct

OpenStudy (ohohaye):

Ok, thanks

OpenStudy (anonymous):

no problem

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