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: Find probabilities of compound events using organized lists, tables, tree diagrams, and simulation.
problem_activity: Problem 1
Veronica is making a poster for science class.
[IMG]
What is the total area, in square feet, of the poster?
Problem 2
Setsuko is redoing a room and wants to put wallpaper on a wall that has a window. The wall with the window, shaded, are shown in the diagram below.
[IMG]
How many square feet of wallpaper will Setsuko use on the wall?


aligns: no