**Graphs of Trigonometric Functions**

In each of the problems 1-3 match a given graph with a possible formula.

**Problem 1.**

**(A)**
**(B)**
**(C)**
**(D)**

**Problem 2. **

**Hint:**
** **
Remember that
is approximately equal to 3.14,
is approximately equal to 6.28 and so on.

**(A)**
** (B)**
**(C)**
**(D)**

**Problem 3.**
** **

**(A)**
**(B)**
**(C)**
**(D)**

*MTH 111 Quizzes, B. Kaskosz and L. Pakula, 2001.*