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: Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.
problem_activity: Problem 1
An incomplete calculation of 392 ÷ 7 is shown below. Fill in the boxes to write the missing numbers that would make the calculation complete.
[IMG]
Problem 2
Solve. Then check your work.
$$596\div3$$
Problem 3
Chris baked 128 cookies to sell at his bakery. He put the cookies in boxes that can each hold 6 cookies. He will only sell full boxes. How many full boxes of cookies does he have to sell?


aligns: no