Question

i want to graph 2sinx = x on a graphing calculator but I don't know how...HELP ME!?

Answer 1

2sinx = y?

Answer 2

no they gave the the question like 2sinx = x so i think i have to convert it to y right?

Answer 3

alternative method: http://www.wolframalpha.com/input/?i=2sinx+%3D+x

Answer 4

oh a graphing calculator you would need to graph two lines, sin(x) and x.

Answer 5

Ok, no then it means you have a line. x = y.
Then you also have 2sinx = y

Answer 6

Is this a TI brand calculator?

Answer 7

yes its TI-84

Answer 8

On the upper left there is a button that says "y=". Punch it.

Answer 9

so i have -2sinx = 0 what do i do next?

Answer 10

When you press that button you should have rows that say y0=, y1=, y2=, y3= etc etc...
You can put y0=x then y1= 2sinx
Then hit the graph button

Answer 11

oh yess! i got it!

Answer 12

and how do you find the intersection of the 2 lines?

Answer 13

Let me break out my TI82. Should be similar... 1 sec

Answer 14

thank you!

Answer 15

Alrighty, there may be a more elegant solution. But get to the graph display. Then hit 2nd "trace", which is actually "calc"

Answer 16

ok

Answer 17

You will see an option that says "intersect", hit that

Answer 18

ok

Answer 19

You will see on the graph that the functions appear to intersect at 3 points. So you will have to do this for all three.

The first thing it will say is "First curve?"

Answer 20

yes

Answer 21

If you move the right and left arrows, you will see the pointer move along the y = x line. Move the dot to the left of the first intersection point and hit enter.

Answer 22

Then it will say "Second curve?". Move the cursor to the right of the intersection point.

Answer 23

After this it will say "Guess?"

Answer 24

Let me know when you are there.

Answer 25

yes

Answer 26

Ok, when it says guess, move the cursor as close as you can to where it looks like they intersect and press enter.

Answer 27

It will calculate for a few seconds, then you will have an x and y in the bottom. That is where the two curves intersect.

Answer 28

ahhh thank you!!

Answer 29

I get x = -1.895494 and y = -1.895494 for the first. Just repeat the steps for the other two intersections.

Answer 30

okay gotcha! thank you so much ! you helped me alott!

Answer 31

No prob.