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.

Problem 3.

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