Question 1080058
All you have to do is replace θ with the given values.



I will do the first one only.




r = 8 cos θ



Let θ = 0°



r = 8 cos(0°)



You know that cos(0°) = 1. 



r = 8(1)



r = 8



Did you follow? 



Do the same for the other values.



If you do not know the cosine value for the other degrees given, plug each into a 



scientific calculator or use the wolfram website or mathway.com to find the rest.