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


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

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, does the following problem or activity enable students to learn the full intent of the following concept or skill?

shot_info: fl_problem_001894_pos_0

HS_0
standard_description: Fluently multiply multi-digit whole numbers using the standard algorithm.
problem_activity: Stage 4: Decimals
Required Preparation
Materials to Gather
Number cards 0–10
Materials to Copy
Blackline Masters
Greatest of Them All Stage 4 Recording Sheet

Narrative
Students make decimal numbers less than 1.
Variation:
Students can write digits in the ones and tens place, as well.


aligns: no