Answer:
My guess is A. Forgive if I'm wrong.
Answer:
b = c - a - D
Step-by-step explanation:

They are both periodic functions that look like waves. They both have a period of 2pi and oscillate between 1 and -1.
Answer:
Step-by-step explanation:
I attached a graph.
Hope that helps!
Answer:
It goes up one number counting each time
Step-by-step explanation:
3 4 5 2 one cap
5 8 13 two cap