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: Identify shapes as two-dimensional (lying in a plane, “flat”) or three-dimensional (“solid”).
problem_activity: Narrative
The purpose of this warm-up is for students to extend the verbal count sequence to 30. Students also see the numbers written as they say each number to help connect the number names to the written numbers. In the synthesis, students determine the next number in a count, which prepares them to count on from a given number. This deepens their understanding of the structure of the counting sequence (MP7).
Launch
Groups of 2
“Let’s count to 30.”
Activity
Count to 30 together.
Record as students count.
Count to thirty 1–2 times. Point to the numbers as students count.
Student Response
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Activity Synthesis
“I’m going to count. When I stop counting, whisper to your partner what number comes next when we count.”
Count to 5.
“What number comes next when we count?”
Count to 11.
“What number comes next when we count?”


aligns: no