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: Count forward beginning from a given number within the known sequence (instead of having to begin at 1).
problem_activity: Stage 3: Represent
Required Preparation
Materials to Gather
Crayons
Cups
Two-color counters
Materials to Copy
Blackline Masters
Shake and Spill Stage 3 Recording Sheet Kindergarten
Shake and Spill Stage 3 Recording Sheet Grade 1

Narrative
Students decide together how many counters to use (up to 10). One partner spills the counters. Both partners represent the red and yellow counters on the recording sheet.
This stage has two different recording sheets, one for kindergarten and another for grade 1. Be sure to use the appropriate recording sheet with students.
Additional Information
Each group of 2 needs a cup and 10 two-color counters.


aligns: no