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

Measure and estimate lengths in standard units.

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

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

Represent and interpret data.

Describe and compare measurable attributes.

Tell and write time.

Measure lengths indirectly and by iterating length units.

Relate addition and subtraction to length.

Work with time and money.

Convert like measurement units within a given measurement system.

Geometric measurement: understand concepts of angle and measure angles.

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

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

Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
problem_activity: Problem 1
Choose the best estimate for the volume of the paint in a paint can.
Problem 2
How much liquid is in each container? For any measurement that is not exact, make an estimate. Be sure to include units, milliliters or liters, in your answer.
a.
[IMG]
b.
[IMG]
c.
[IMG]


correct_option_index: 3