Question

can someone help me graph sin(2x-pi/3)?

Answer 1

could you help me out with this problem?

Answer 2

you still there?

Answer 3

http://math.ucsd.edu/~wgarner/math10a/triggraphs.htm
see figure 3 and move the curve by pi/3

Answer 4

ok

Answer 5

the period is changed to pi because of the 2x, right?

Answer 6

yes

Answer 7

ok

Answer 8

so

Answer 9

ehh

Answer 10

I move the coordinates (0,0) to the left by pi/3?

Answer 11

you still there?

Answer 12

i think it should be moved by right
use (pi/6,0)

Answer 13

why pi/6?

Answer 14

I understand how to graph (2x

Answer 15

but is there a way to annonate 2x-pi/3?

Answer 16

like can you annonate the points on the graph with pi over whatever or do you have to write the points in decimal numbers for 2x-pi/3?

Answer 17

because at y=1, x= approximately -.856

Answer 18

I don't know how to write that in pi/ whatever

Answer 19

or is it not necessary to annonate in terms of pi for that particular problem?

Answer 20

i use pi more often... both are fine i think

Answer 21

but if I were to write it in pi, how would I know when it came to a problem like 2x-pi/3?

Answer 22

when i draw the graph i use it because it's clear and more straightforward

Answer 23

2x-pi/3=0 and when this happens sin2x=sin0=0

Answer 24

hmm...

Answer 25

I'm trying to think here...

Answer 26

so, would the period still be pi?

Answer 27

and would each of the points be in terms of like pi/6?

Answer 28

so you would have like 12 points?

Answer 29

yep it's just an assumption. makes it easier for me to visualize the graph

Answer 30

ok, that makes sense

Answer 31

you think it is necessary to annonate?

Answer 32

sorry, what are points?

Answer 33

coordinates

Answer 34

in a graph

Answer 35

as he said 2x then move pi/3 to the right

Answer 36

exactly

Answer 37

the second graph has less humps

Answer 38

the first one had 6 while the second one has half as much

Answer 39

that is called compression

Answer 40

because of 2x?

Answer 41

would the period also change to pi or do I have to worry about that?

Answer 42

yeah it's has twice more waves

Answer 43

look at sin x and sin 2x

Answer 44

so do I move the graph pi/3 to the right?

Answer 45

yes just like the first graph i showed

Answer 46

that's what happens to the -pi/3 part

Answer 47

sorry if i am so clueless, I just have a teacher that has major trouble speaking

English, and I took Trigonometry online where I couldn't really ask questions

:(. I would probably learn about more if I had teachers like you guys.

Answer 48

cool you learned it online