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cutiecomittee123
 one year ago
What functions are equivelent to y=4cosx2
y=4cos(x)2
y=4sin(x+pi/2)2
y=4sin(xpi/2)2
y=4cosx+2
cutiecomittee123
 one year ago
What functions are equivelent to y=4cosx2 y=4cos(x)2 y=4sin(x+pi/2)2 y=4sin(xpi/2)2 y=4cosx+2

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0cos(x)=cos x . now try

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.1these are some identities try using them to get the answer \[\cos(x)=\cos(x)\]\[\sin \left( \frac{ \pi }{ 2 }+x \right)=\sin(x)\]\[\sin \left( \frac{ \pi }{ 2 }x \right)=\cos(x)\]

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1so a and d work in that case?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1is it because its not the x that is being negative, its the whole equation?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1and is that the only one that is equal?

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.1so if d is the answer 4cos(x)+2=4cos(x)2 bring both on right hand side 0=8cos(x)4 is this correct no its not so d won't wrk what do u think about c

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1oh i see, so if you just set them equal to eachother and solve then you will get your answers!!!!!

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.1yea u can check the options like that

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.1if the option u choose satisfies the equation then its correct :D

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0You can also use a graphing calculator to check. https://www.desmos.com/calculator/lwlzconupi Notice how the original graph of `y=4cos(x)2` (in red) does not match with choice D `y=4cos(x)+2` (in blue). If they did match, then one curve would be right on top of the other. You can turn on/off the graphs to see if one was on top of the other.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0this shows how the original graph matches up with choice A https://www.desmos.com/calculator/gwwpecq6te click the circle icons to turn the graph on/off and you'll see one graph overlapping perfectly on the other

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1well b and c cannot match because they are sin and the origional is cosine, right?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1actually i just tested it and b actually matches up

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0btw @imqwerty it should be sin(pi/2 + x) = cos(x)

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0yeah B should match with the original

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1so b and d are both equal

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.1>.< oh srry silly mistake

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0`so b and d are both equal` incorrect

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1yeah but b and d match up

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1so then just d? was I right about the fact that they cannot be the same because b and c are sine and the origional is cosine?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0since sin(pi/2 + x) = cos(x), this means y=4sin(x+pi/2)2 turns into y=4cos(x)2

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1okay i kind of get that so does that mean that c works

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1i graphed it and they matched up

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0ok I graphed the original equation (in box 1) and the four answer choices (boxes 2 through 5). Only box 1 is turned on. The other graphs are turned off https://www.desmos.com/calculator/koejh8yigm I recommend going through each and turn them on one at a time. example: turn on box 1 and box 3 to compare the original with choice B

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0hopefully you'll be able to see that A matches B matches C does not match D does not match

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.1yep that what i see too. I tested it out
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