Which function has the graph attached inside?

A. y=tan2x

B. y= 1+sin x

C. y= 2cos x

D. y= -2 - cos (x-pi)

***my answer: C

not too sure though... :/ is it right? :)

Question

Which function has the graph attached inside?

A. y=tan2x

B. y= 1+sin x

C. y= 2cos x

D. y= -2 - cos (x-pi)

***my answer: C

not too sure though... :/ is it right? :)

anonymous · Answer

graph!

terenzreignz · Answer

It's sinusoidal, isn't it?
Means it had best be a sin or a cos...

anonymous · Answer

yes :)

so A is definitely out right?

terenzreignz · Answer

A is out, yes.
Now, normally, sines and cosines have their centre along the x-axis
such is not the case for this one, where is the centre?
That is to say, the average of the highest value that the graph attains and the lowest.

anonymous · Answer

urmmm is the center at 1?

terenzreignz · Answer

Yes, it is :)
so it got a vertical shift of 1.
That means it has to have a +1 somewhere.
So you have your answer? ^.^

anonymous · Answer

okay.. :) so is the answer B. y= 1+sin x ??

terenzreignz · Answer

Yeap :)

anonymous · Answer

awesome, thanks!!