Question 1080218
<pre>
To learn about this type problem, go here:

http://math.illinois.edu/~rasekh2/math231(s2016)/PolarEquations.pdf

The graph of the polar equation 

{{{matrix(1,3,r,""="",a*sin(n*theta))}}}
or
{{{matrix(1,3,r,""="",a*cos(n*theta))}}}

is a rose with n or 2n equally-spaced petals, 
each of length = a.

If n is odd, there will be n-petals.
If n is even, there will be 2n petals.

If it's sine, one petal is bisected by the y-axis.
If it's cosine, one petal is bisected by the x-axis.

Edwin</pre>