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Sketch the graph of y=cos(x+pie/2). I don't understand how to do this.

Mathematics
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Do you know how to sketch the graph of y = cosx ?
yes i do
The graph of y = cos(x + pi/2) looks a lot like y = cos x. You could see this as follows: cos 0 = 1 is the starting point of the "normal" cos. To get 1 as a result from your function, you need to substitute -pi/2 for x. That means the starting point of cos(x + pi/2) has shifted...

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to the left right?
Right, to the left!
So, it would start at -pie/2 and would it go to pie/2 in the positive direction?
The period (2pi) hasn't changed, so it would end at 3pi/2, exactly 2pi to the right from -pi/2
oh, ok i get it now thanks!!!
Thank you too!

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