Question

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.
r = 2 cos 5θ

Answer 1

Let r=f(x)
check f(-x)

Answer 2

Would it be the y-axis? @Xeph

Answer 3

symmetric about the y-axis (even symmetry), yes

Answer 4

Thank you so much @Xeph