Question

Sketching of Curves in Polar Coordinates
i symmetry about the Initial Line.
ii. Symmetry about the y-axis.
iii. symmetry about the Pole.

Answer 1

can anyone tell me what is meany the those three points???

Answer 2

i. this is symmetry about the polar axis (which is the positive x axis)
if you replace $$ \theta $$with$$ -\theta $$
in r(theta) , it is symmetry about the polar axis

Answer 3

But what Basically symmetry is?

Answer 4

it means like a mirror reflection