Question

Which rectangular equation is equivalent to the polar equation r cos theta = -2

Answer 1

x= -2

Explanation:

A PEX

Answer 2

The rectangular equation is equivalent to the polar equation r cos theta = -2 is: x=-2

Explanation:

r cosФ=-2

cosФ=x/r, replacing this in the equation above:

r (x/r)=-2

Simplifying:

x=-2