Question

(-1,1) from rectangular to a polar coordinates.
a. (2, 315degrees)
b. (sqrt2, 135degrees)
c. (sqrt2, 315degrees)
d. (sqrt2, 225degrees)

Answer 1

\[\Large r=\sqrt{x^2+y^2}\]
and
\[\Large tan(\theta)=\frac{y}{x}\]
use x=-1 and y=1 to get r and theta.

Answer 2

0?

Answer 3

@sami-21 I'm not getting it :/

Answer 4

\[\Large r=\sqrt{(-)^2+(1)^1}\]
\[\Large r=\sqrt{2}\]
\[\Large tan(\theta)=\frac{1}{-1}\]
\[\Large \theta=tan^{-1}(-1)\]

Answer 5

-45

Answer 6

Am I right? So that means...

Answer 7

it is in the second quadrant !!!! (-1,1)
so 180+(-45)=135

Answer 8

Oh o.k. I understand. Thank you so much, I really appreciate your help