graph the function. -2 + sin x. someone help pls.

Question

helder_edwin · Answer

you have $y=-2+\sin x$

helder_edwin · Answer

do u know the graph of $y=\sin x$?

anonymous · Answer

the graph of sinx should intersect on pi, 2pi etc and the graph of coax should intersect the x axis at pi/2, 3pi/2 etc.  Am I right?

helder_edwin · Answer

yeah, but do u know it shape?

anonymous · Answer

yes

anonymous · Answer

sin x starts from 0 on the y int and cost starts from one. right?

helder_edwin · Answer

http://www.wolframalpha.com/input/?i=graph+y%3Dsin+x

helder_edwin · Answer

now the -2 outside of sin x is a vertical movement of the graph
is it upward or downward?

anonymous · Answer

downward

helder_edwin · Answer

good

helder_edwin · Answer

so just move the whole graph 2 units downward
do u get this?

anonymous · Answer

I moved my graph down to -2 on the y-axis and just kept the original x-int but not only going up to -1. but that seems to be wrong. =/

helder_edwin · Answer

u have to move the whole graph http://www.wolframalpha.com/input/?i=graph+y%3D-2%2Bsin+x

anonymous · Answer

yes, seems like I did it right but just didn't see it. lol. Thank u so much!

helder_edwin · Answer

u r w

anonymous · Answer

can u help me with this pls. graph: y=cos2x. I'm kind of confused with the period. I know that it is 2pie/k and I think that we have to divide this by 4. after we get the answer for that what do I have to do?

helder_edwin · Answer

ok 2 is multiplying x

helder_edwin · Answer

if u r familir with the graph of cos x then
if $x=\pi/4$ then $2x=\pi/2$
right?

helder_edwin · Answer

sorry here it's late. http://www.wolframalpha.com/input/?i=graph+y%3Dcos+2x%2C+y%3Dcos+x

anonymous · Answer

ok thank u.