Question

Which set of rectangular coordinates describes the same location as the polar coordinates (4, pi)?

Answer 1

U know (r,theta) is called a polar coordinates. Right?

Answer 2

(x,y) is called rectangular coordinates. Rght?

Answer 3

I think so I am just learning this today.

Answer 4

And the relation between polar coordinates n rectangular coordinates is
x=r*cos theta
y=r*sin theta

Answer 5

No
(x,y)

Answer 6

Oh ok

Answer 7

so (4, pi) then

Answer 8

oh I see

Answer 9

Given
r=4
Theta=pi
Right?

Answer 10

x=?
y=?

Answer 11

x=r*cos theta=4*cos pi=?
y=r*sin theta=4*sin pi=?

Answer 12

Dont u know
Cos pi=?

Answer 13

Sin pi=?

Answer 14

Cos pi=cos(pi+0)=-cos0=-1
Right?

Answer 15

sin pi = 0

Answer 16

Correct!!!!!!

Answer 17

Cos pi=cos(pi+0)=-cos0=-1 this is true

Answer 18

Now tell me
x=?
y=?

Answer 19

(0, -1)?

Answer 20

No!!!!

Answer 21

x=4*(-1)=?

Answer 22

y=4*0=?

Answer 23

-4, 0

Answer 24

Feel free to ask for clearing any confusion!!!

Answer 25

Great!!!!!!

Answer 26

Ok thank you for spending the time with me sorry for not understanding so fast.

Answer 27

So u got it !!!

Answer 28

U r most welcome!!!

Answer 29

Glad to help u!!!!!!

Answer 30

oh ok so the answer is c. (4, 0) thank you I going to reread everything you told me so I understand this better. Thanks again for your time and help!

Answer 31

Not (4,0)

Answer 32

Its
(-4,0)

Answer 33

Sorry I wrote that by mistake (-4, 0) which would be chose B. then :)

Answer 34

Ya....

Answer 35

Don't hesitate to ask more!!!