Indentify the equation(lemniscate,cardiod,etc) and graph the polar equation.
Here's the graph :
https://www.desmos.com/calculator/2xbbdz3mlv
When we have the form
r = a sin (nθ)
If n is odd we have an "n" petal rose curve
If n is even we have a "2n" petal rose curve
So.....this is a 4 petal rose curve