few_shots: Example:
Problem/activity:
Find the general solution for:
$${\mathrm{cos}\left({\pi\over2}+x\right)=\mathrm{tan}{\pi\over4}}$$


Mathematical concept/skill options: 
A. Prove and apply trigonometric identities.
B. Model periodic phenomena with trigonometric functions.
C. Interpret functions that arise in applications in terms of the context.
D. Build a function that models a relationship between two quantities.
E. Define, evaluate, and compare functions.
F. Use functions to model relationships between quantities.
G. Understand the concept of a function and use function notation.
H. Analyze functions using different representations.
I. Extend the domain of trigonometric functions using the unit circle.
J. Interpret expressions for functions in terms of the situation they model.
K. Build new functions from existing functions.
L. Construct and compare linear and exponential models and solve problems.


Your response, in json format:
{
  "explanation": "This problem applies trigonometric identities, including the angle addition formula for cosine.",
  "answer": "A"
}

Now, assign the following problem or activity to one or more relevant mathematical concepts/skills it teaches.
shot_info: fl_problem_001894

HS
options: Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.

Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures.

Geometric measurement: understand concepts of angle and measure angles.

Geometric measurement: understand concepts of volume and relate volume to multiplication and to addition.

Tell and write time.

Relate addition and subtraction to length.

Represent and interpret data.

Geometric measurement: understand concepts of area and relate area to multiplication and to addition.

Measure and estimate lengths in standard units.

Convert like measurement units within a given measurement system.

Work with time and money.

Classify objects and count the number of objects in each category.

Describe and compare measurable attributes.

Solve problems involving measurement and conversion of measurements from a larger unit to a smaller unit.

Measure lengths indirectly and by iterating length units.
problem_activity: Stage 3: Compare Units in a Given System
Required Preparation
Materials to Copy
Blackline Masters
Would You Rather Stage 3 Spinner
Would You Rather Stage 3 Recording Sheet

Narrative
The first partner spins to get a measurement and a unit. They write a question that compares the amount they spun to a quantity reported in the given measurement system.


correct_option_index: 9