Answer:
E
Step-by-step explanation:
r = 2 cos (3θ) is symmetric about the x-axis.
To find probability you can use proportions
What i would do is 6/10 since it cant be 7 and then cross multiply it by 1/10.
This should get you 60%
What do you need help with
Add all three expressions up and set them equal to 180 degrees, because there are 180 degrees in a triangle.
