Question

The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph.

a circle symmetric to the x axis where the majority of the circle lies in quadrants two and three
[-5, 5] by [-5, 5]

r = 2 - 2 cos θ

r = 3 - 2 cos θ

r = 3 - cos θ

r = 3 - sin θ

Answer 1

To be honest, I cheat by using graphing tool to get the answer, it's \[r =3-2cos\theta\]
algebraic way , \[r =2-2cos\theta\]has value r = 0 when theta = 0. and \[r=1-\sqrt2~when~\theta=\frac{\pi}{4}\] . the graph is not a circle.

Answer 2

it's okay thanks anyway :)

Answer 3

That answer is wrong.

Answer 4

When I graph it I get r = 3 - cos θ?????

Answer 5

r = 3 - cos θ
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