Question

Which rectangular equation is equivalent to the polar equation r cos theta=-2?
A. x= -2x^2
B. y=-2
C. x=2
D.x^2+ y^2=-2?

Answer 1

\[r \cos \theta = -2\] note that \[x = rcos \theta\]\[y= r \sin \theta\]\[r^2=x^2+y^2\]

Answer 2

c. x=-2?************

Answer 3

Yes :)

Answer 4

was that a typo true x = -2 but C says x = 2

Answer 5

Yup