Answer:
and 
Step-by-step explanation:
Recall that
is a value of the function cosine for the special angles:
and
, then:

Answer:
Step-by-step explanation:
n ≥ -2 + 9
n ≥ 7
Let's firstly convert the mixed fraction to "improper" and then proceed,

Answer: 75 degrees on the other two angles because all of the angles added together should be 180. So if you do 180-30 then divide that by 2 you get the other two angles.
Step-by-step explanation:
The correct Answer is B Morning Newspaper