options: Model periodic phenomena with trigonometric functions.

Interpret expressions for functions in terms of the situation they model.

Use functions to model relationships between quantities.

Define, evaluate, and compare functions.

Construct and compare linear and exponential models and solve problems.

Interpret functions that arise in applications in terms of the context.

Build a function that models a relationship between two quantities.

Prove and apply trigonometric identities.

Extend the domain of trigonometric functions using the unit circle.

Analyze functions using different representations.

Build new functions from existing functions.

Understand the concept of a function and use function notation.
problem_activity: Task
Use the graph (for example, by marking specific points) to illustrate the statements in
(a)–(d).  If possible, label the coordinates of any points you draw.
[IMG]
$f(0) = 2$
$f(−3)=f(3)=f(9)=0$
$f(2) = g(2)$
$g(x)>f(x)$ for $x>2$


correct_option_index: 11