Derive the property

$$\cos (A-B)=\cos A \cos B+\sin A \sin B$$

Try to do this on your own, looking at the cext only long enough to get yourself started if you get stuck.

What are the major determinants of price elasticity of demand? Use those determinants and your own reasoning in judging whether demand for each of the following products is probably elastic or inelastic: ketchup;

Write two of your own sample problems that are descriptions of how to solve a mass-mass problem. Assume that your sample problems will be used by other students to learn how to solve mass-mass problems.

Use a calculator to evaluate the expression to four decimal places.

$$e^{-3.4}$$

Your friend tells you that his height is 182 cm. In your own words, explain the range of heights implied by this statement.

Decide whether each of the following questions are biased. Explain your decisions with support from the discussion of question bias. What is your opinion of the food in the school cafeteria?

Completa el párrafo, describiendo tu

propio horario (your own schedule).

y para la clase de matemáticas, necesito $\underline{\hspace{10pt}11\hspace{10pt}}$.

Eliminate repetition by replacing the boldfaced word or words with a synonym from your lesson words.

A century ago, children generally followed the occupation of their elders, instead of choosing an occupation of their own.

Which is more valuable, $20,000 received now or$5000 per year for 4 years? Why? Explain the term "time value of money" in your own words.

Sketch a model of your own ecological footprint. Include boxes to represent the resources you use, their original sources, and any activities that affect your environment. Draw arrows to indicate relationships between factors.

Tubular secretion of hydrogen is directly linked to
a. tubular secretion of potassium.
b. tubular secretion of sodium.
c. tubular reabsorption of potassium.
d. tubular reabsorption of sodium.
e. tubular secretion of chloride.

In a small group, discuss and actively work through the construction of the Pinwheel Pattern and prove that it has no rigid symmetries. After your discussion, write a brief narrative describing the construction and proof in your own words.

Give formulas for the following. triamminechloroethylenediaminechromium(III) iodide

You left your backpack on the bus this morning. Check the questions that would be good to ask before your math class.

atih, de quoi tu as besoin?