few_shots: 
Example 1:
Concept/skill: 
Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

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


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.

Example 2:
Concept/skill: 
Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).

Problem/activity:
Task
Solve the quadratic equation
$$ x^2 = (2x - 9)^2 $$
using as many different methods as possible.


Answer: 
No. This task does not involve an equation in two variables. There is only one variable, x.

Example 3:
Concept/skill: 
Construct a tangent line from a point outside a given circle to the circle.

Problem/activity:
Task
Suppose $A$ is an angle with vertex $P$, as pictured below:
[IMG]
Draw a circle with center $P$ and with  radius $r \gt 0$.  Explain why the circle
meets each ray of angle $A$ in a single point.  Label these points $Q$ and $R$ respectively.
Draw circles with centers $Q$ and $R$ respectively and radius $r$.  These circles meet at $P$ and a second point to be labelled $B$.
Show that ray $\overrightarrow{PB}$  bisects angle $P$.


Answer: 
No. This task does not involve drawing lines that are tangent to circles. The only line that may be drawn is the ray between points P and B.

Now, determine whether the following problem or activity can enable students to understand the concepts or skills in the provided description.

shot_info: fl_problem_001894_pos_0

HS_0

im_task_000870_neg_0

HS_1

im_task_001160_neg_0

HS_2
standard_description: Make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8). Use operations on fractions for this grade to solve problems involving information presented in line plots. For example, given different measurements of liquid in identical beakers, find the amount of liquid each beaker would contain if the total amount in all the beakers were redistributed equally.
problem_activity: Problem 1
Use a gallon, quart, pint, and cup container and water to answer the following questions.
What do you notice about the relationship between the capacity of a gallon and the capacity of a quart?
What do you notice about the relationship between the capacity of a quart and the capacity of a pint?
What do you notice about the relationship between the capacity of a pint and the capacity of a cup?
What do you notice about the relationship between the capacity of a cup and the capacity of a fluid ounce?
Problem 2
Fill in the following conversion tables.
[IMG]
Problem 3
Joseph is told to dissolve a medicine in 1 pint 4 ounces of water. He has a measuring cup marked in ounces. How many ounces of water should he pour?
Problem 4
Dominica’s mom signs up to bring a gallon of fruit punch to the family potluck. She plans to use the following recipe:
| **            Fruit Punch           **  **            Ingredients:           **  *                       2 (6 ounce) cans frozen orange juice concentrate              *                       2 (6 ounce) cans frozen lemonade concentrate              *                       1 (3 pint) can pineapple juice              *                       3 cups water              *                       1 quart 2 ounces soda |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
Will this recipe yield a gallon of fruit punch? If not, how much more fruit punch would she need to make? If so, how much more than a gallon will she have?


aligns: no