options: Extend the domain of trigonometric functions using the unit circle.

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

Prove and apply trigonometric identities.

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

Model periodic phenomena with trigonometric functions.

Define, evaluate, and compare functions.

Build new functions from existing functions.

Construct and compare linear and exponential models and solve problems.

Build a function that models a relationship between two quantities.

Understand the concept of a function and use function notation.

Analyze functions using different representations.

Use functions to model relationships between quantities.
problem_activity: Given:
$${{f(x)}=\mathrm{cos}(2x)}$$
$${g(x)=-\mathrm{cos}(x)}$$
[IMG]
a.   Describe the period, amplitude, and midline of the function
$${f(x)}$$
.
b.   Where is
$${f(x)}=g(x)$$
over the domain of
$${0\leq x \leq 2\pi}$$
?


correct_option_index: 2