CK-12-Pre-Calculus Concepts

http://www.ck12.org Chapter 5. Trigonometric Functions

Answers:

1. Use logic to identify five key points. Use those key points to come up with a sketch. Use the sketch to identify
   information for the equation.

TABLE5.7:

Time (seconds) Fish height (feet)

0 -2

20 14

40 -2

10 −^2 + 214 = 6

30 6

The amplitude is 8 soa=8. The function looks like a negative cosine graph. The vertical shift isd=6 and the
period is 40.