Answer:
1.) 
2.)
3.)
Step-by-step explanation:
I did this, in like, 2 weeks ago.
Check attachment for answer.
Answer:
1)
°
2)
°
Step-by-step explanation:
1)
As these two angles are supplementary (They add together to equal 180°) we can setup the equation and solve for x.

2)
Again, these two angles are supplementary we can setup the equation and solve for x

On a cos(x) graph, the minimum y-value is always -1. Since you are adding 5 to -1, the minimum values is 4.