Question

Find the rectangular equation of the curve whose parametric equations are x=-cos t and y=sin t, 0 degrees<=t<=360 degrees

Answer 1

Rectangular equation? Do they mean the equation in the Cartesian coordinate system?

Answer 2

this is the question

Answer 3

Making it multiple choice really kills the question.

Anyway, just plug in the equations into x and y and you'll see whether they work or not.

Answer 4

It helps to know \[
\sin^2 t+\cos ^2t = 1
\]

Answer 5

so c?

Answer 6

yes

Answer 7

thanks so much