## What does a negative r mean in polar coordinates?

The absolute value of r, |r|, is the distance between the point and the pole. 1. If r is positive (r > 0) then the point lies on the terminal side of θ 2. If r is negative (r < 0) then the point lies on the ray opposite of the terminal side of θ

How do you find the negative radius in polar coordinates?

It is also useful to allow negative radius: (−r, θ) means to move out along the line at angle θ, but in the opposite direction from the positive ray, along the ray θ ± π; thus: (−r, θ)=(r, θ ± π). y = r sin(θ).

What does r mean in polar coordinates?

The coordinate r is the length of the line segment from the point (x,y) to the origin and the coordinate θ is the angle between the line segment and the positive x-axis.

### Can you have a negative R2?

Note that R2 is not always the square of anything, so it can have a negative value without violating any rules of math. R2 is negative only when the chosen model does not follow the trend of the data, so fits worse than a horizontal line.

Can an r value be greater than 1?

Thus, the nominator of r raw formula can never be greater than the denominator. In other words, the whole ratio can never exceed an absolute value of 1.

So not only is it possible for a circle to have a negative radius, all circles already do have a negative radius! This is about the radius squared — negative square would imply something like imaginary radius, not negative radius.

#### Is there a negative radius?

So not only is it possible for a circle to have a negative radius, all circles already do have a negative radius!

How do you find r in polar coordinates?

To convert from Cartesian Coordinates (x,y) to Polar Coordinates (r,θ):

1. r = √ ( x2 + y2 )
2. θ = tan-1 ( y / x )

What is the rectangular form of r − 2 sin θ )?

r=−2sinθ=−yr . and so, r2=x2+y2=−2y .