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, assess whether the following problem or activity is 'aligned' with the given Common Core standard in Mathematics.

shot_info: fl_problem_001894_pos_0

HS_0
standard_description: Read, write, and compare decimals to thousandths.
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: yes