few_shots: 
Example:
Concept/skill: 
Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

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


Answer: 
Yes. An initial step when solving for x in this problem requires the use of the addition formula for cosine on the left side of the equation.

Now, determine whether the following problem or activity can enable students to understand the concepts or skills in the provided description.

shot_info: fl_problem_001894_pos_0

HS_0
standard_description: Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in whole-number units.
problem_activity: Problem 1
a.   Split 18 counters equally into groups of two.
i. Write a multiplication equation to represent this situation.
ii. How many groups of counters do you have?
b.   How is this similar to Anchor Task #1 from Lesson 3? How is it different?
Problem 2
a.   Casey bought the following stickers. She wants to put 5 stickers in each goodie bag for her birthday party.
[IMG]
i. Write a multiplication equation to represent this problem.
ii. How many goodie bags did Casey fill with stickers?
b.    A grocery store puts 30 watermelons on display. They arrange them in rows of 10.
i. Write a multiplication equation to represent this problem.
ii. How many rows of watermelons are there?
Problem 3
a.   Draw a picture or write a story to represent the following multiplication situation.
___
$$\times \ 4 = 12$$
b.   Find the number that makes the equation true. Rewrite the equation with the solution.


aligns: no