Question

PLEASE HELP ASAP. I DO NOT UNDERSTAND.

Which rectangular equation is equivalent to the polar equation r sin(theta) = -2

A. x = -2
B. y = -2
C. x^2 + y^2 = -2
D. y = -2x^2

Answer 1

Do you know the equations to go between rectangular and polar?

Answer 2

I have no idea. ): @peachpi

Answer 3

1) x = r cos Θ
2) y = r sin Θ
3) x² + y² = r²

Answer 4

-2 is y right?

Answer 5

right

Answer 6

If I were to do option 3 would it be r = x - 2?

Answer 7

you mean if you were to convert that to polar?

Answer 8

Yes. @peachpi

Answer 9

It would be r = -2.

Answer 10

Don't mix the variables. (r, Θ) is polar and (x, y) is rectangular.

Answer 11

Ohhh, Ok.

Answer 12

I don't know what to do now? @peachpi

Answer 13

Would the answer be C?

Answer 14

It's B, y = -2

Answer 15

I don't understand why.. ):

Answer 16

its the inter conversion between the rectangular and polar coordinates system
in rectangular(X,Y) in polar (r,theta)
so x=rcos(theta)
y=rsin(theta) and
\[x ^{2} + y ^{2} = r ^{2}\]