Question

PLEASE HELP
Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.

r = 2 cos 3θ

Answer 1

@satellite73

Answer 2

give me a second here..

Answer 3

It is symmetric about the x-axis because cos(3θ) = cos(-3θ).

It is not symmetric about the y-axis because cos(3θ) is not equal to cos(3(pi-θ)).

It is not symmetric about the origin because cos(3θ) is not equal to -cos(3θ).