Question

Thanks for helping! Help with symmetries!

Identify, graph, and state the symmetries of each polar equation. Write the scale that you are using for the polar axis.

r=9cos(5 theta)

Answer 1

@Hero @jim_thompson5910 @phi @zepdrix @SithsAndGiggles @wio @sleepyjess @Data_LG2

Answer 2

I can't figure out the symmetries though

Answer 3

You can check if its symmetry by putting in \(-\theta\) in \(\theta\)
\(r=9cos(5\theta)\)
Replacing it,
\(r=9cos(5(-\theta))\)

\(r=9cos(-5\theta)\)
Can be written as
\(9cos(5\theta)=r\)
Which means this equation is symmetrical