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: Use place value understanding to round whole numbers to the nearest 10 or 100.
problem_activity: Problem 4
Pre-unit
Here are the lengths of some lizards in inches. Use the lengths to complete the line plot.
\(2\frac{1}{4}\)
\(1\frac{1}{2}\)
\(2\frac{2}{4}\)
3
\(3\frac{2}{4}\)
2
\(2\frac{1}{4}\)
\(2 \frac{1}{4}\)
\(2\frac{3}{4}\)
2
\(2\frac{1}{4}\)
3
[IMG]


aligns: no