Trigonometric Functions practice problems

5 problems from Calculus I, each with a full worked solution.

1. Problem 1

   Difficulty 1/5
   

2. Problem 2

   Difficulty 1/5
   

3. Problem 3

   Difficulty 2/5
   

4. Problem 4

   Difficulty 3/5
   

5. Problem 5

   Difficulty 3/5