Turns out that I'm going to need help with this question. I wasn't able to figure it out on my own. Thanks for the help!
Accepted Solution
A:
Answer:r=1Step-by-step explanation:x^2 +y^2 =1We know that x^2 + y^2 = r^2Replacing that in the equationr^2 =1Taking the square root of each sidesqrt(r^2) = sqrt(1)r =1The other way is to replace x with r cos theta and y with r sin theta(r cos theta)^2 + (r sin theta) ^2 =1r^2 cos^2 theta + r^2 sin^2 theta = 1Factor out r^2r^2 (cos^2 theta + sin^2 theta) =1We know cos^2 theta + sin^2 theta =1r^2 (1) =1r^2 =1