few_shots: 
Example:
Concept/skill: 
Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.

Problem/activity:
Find the general solution for:
$${\mathrm{cos}\left({\pi\over2}+x\right)=\mathrm{tan}{\pi\over4}}$$


Answer: 
No. This problem does not directly teach how side ratios in right triangles lead to definitions of trigonometric ratios. Instead, it involves solving a trigonometric function.

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

shot_info: fl_problem_001894_neg_0

HS_0
standard_description: Use permutations and combinations to compute probabilities of compound events and solve problems.
problem_activity: Narrative
The purpose of this activity is for students to choose from activities that focus on adding and subtracting or sorting and representing data.
Students choose from any stage of previously introduced centers.
What's Behind My Back?
How Close?
Number Puzzles
Sort and Display
Required Materials
Materials to Gather
Materials from previous centers
Required Preparation
Gather materials from:
What's Behind My Back, Stages 2 and 3
How Close, Stages
1–
3
Number Puzzles, Stages 1 and 2
Sort and Display, Stage 2
Launch
“Today you will choose from centers we have already learned.”
Display the center choices in the student book.
“Think about what you would like to do first.”
30 seconds: quiet think time
Activity
Invite students to work at the center of their choice.
10 minutes: center work time
"Choose what you would like to do next."
10 minutes: center work time
Student Facing
Choose a center.
What's Behind My Back?
[IMG]
How Close?
[IMG]
Number Puzzles
[IMG]
Sort and Display
[IMG]
Activity Synthesis
“Which activity did you choose? What did you like about the activity you chose?”


aligns: no