Question

@goformit100

xDDD !

Answer 1

Use the same formula. Whose link I gave you Ma'am.

Answer 2

Which equation, there are sooo many...?

Answer 3

Wait Ma'am giving you the link Again

Answer 4

Here it is: http://en.wikipedia.org/wiki/Rotation_%28mathematics%29

Answer 5

Pinky Promise The link I gave above^ will surely help you Ma'am

Answer 6

No, I have the link.. I just don't know which formula to use.. plus, Wikipedia isn't a trustworthy source...

Answer 7

Ok let me know the Superb formula I am talking about

Answer 8

Here is the Link: http://upload.wikimedia.org/math/0/e/d/0ed0d28652a45d730d096a56e2d0d0a3.png

Answer 9

I'm saying I do not know which one to use...

Answer 10

LoL Click the link I lastly gave you

Answer 11

One post above

Answer 12

I mean this one Ma'am : http://upload.wikimedia.org/math/0/e/d/0ed0d28652a45d730d096a56e2d0d0a3.png

Answer 13

uh... you don't use sin or cos for this..

Answer 14

as per the question you have been given the required angle of rotation

Answer 15

Ma'am you will have to use...

Answer 16

f this question be solved in other method the question will become much lenthy to be solved. Trust Me. Pinky Promise ;)

Answer 17

*if

Answer 18

@lilia222 did you got how to do it ?

Answer 19

no... can we do it together?

Answer 20

Sure

Answer 21

Shall we start ?

Answer 22

yes :)

Answer 23

Let's start

Answer 24

in the formula plug in theta = 120 degrees

Answer 25

Here is the formula for it ma'am : http://upload.wikimedia.org/math/f/4/e/f4e2a65035540283e6f42be992415789.png

Answer 26

you have to find for S to become S'.
So what's the current coordinate of S in your opinion ?

Answer 27

-3,2

Answer 28

Ya

Answer 29

Now in this formula: http://upload.wikimedia.org/math/f/4/e/f4e2a65035540283e6f42be992415789.png

in place of x and y put the values -3 and 2.

Answer 30

and in place of theta put 120 degrees

Answer 31

What will be the final equation you are getting after that ?

Answer 32

are you there ?

Answer 33

yes

Answer 34

so -3 times 120 and 2 times 120?

Answer 35

x' = (-3) cos 120º - 2 sin 120º
y' = (-3) cos 120º + 2 sin 120º

Answer 36

x' and y' will be the final coordinate for S'

Answer 37

-3.60
-1.28

Answer 38

I thought the angle was 270 degrees? How are you getting 120?

Answer 39

oops Sorry

Answer 40

x' = (-3) cos 270º - 2 sin 270º
y' = (-3) cos 270º + 2 sin 270º


I am really Sorry @lilia222 Ma'am for my mistake

Answer 41

Now please calculate it agian

Answer 42

Thanks @jim_thompson5910 sir for pointing out my mistake

Answer 43

x= -2
y= -3
I see it , a!
haha @jim_thompson5910 always to the rescue! :D

Answer 44

I wanna go.... can I Ma'am ?