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Homework Errors & Questions by Chapter

Chapter 1

Chapter 1 even numbered problems - Version 1 and Version 2 of the Solutions to Selected Odd Problems does not contain the solutions for the EVEN numbered problems assigned on the syllabus for chapter. The solutions are as follows.

• Ch 1.1 #2 - True
• Ch 1.1 # 6 - True
• Ch 1.1 #8 - True
• Ch 1.2 #2 - Degree of 2
• Ch 1.3 #8 - (a-4b)(3c+d)

Chapter 2

Ch 2.1 #54 - The DVD covers this problem but what is written on the board has an error.

Ch 2.8 #57 - The solution in the old version (rev 041408) of the Solutions to Selected Problems is wrong. The final answer should be greater than or equal to 5 but less than or equal to 20. Get the updated Solutions to Selected Prolbems here.

Chapter 5

Ch 5.2 #27 - The solution in the old version (rev 041408) of the Solutions to Selected Problems is wrong. The final answer should be 2e^2x. See the updated solutions to selected problems here.
Ch 5.5 #90 - The solution in the old version (rev 041408) of the Solutions to Selected Problems is wrong. The final answer should be k = 0.0485. Download an updated copy of the Solutions to Selected Problems here.

Chapter 6

Chapter 6 Lesson 2 Number 45--this problem is worked in the "Solutions to Selected Problems" by applying tangent. If that is confusing, though, the Student Solutions Manual, uses algebra steps to solve using only cotangent. We thought you might like to see the alternate approach.

 Chapter 6 Lesson 2, Number 9 "Entering Degrees/Minutes and getting decimal values on your calculator"

You need to be using a graphing calculator like the TI-89 or comparable. Casio makes a good one, so do some other companies.

On the graphing calculator, there are small symbols written above each calculator button. On mine, there are yellow symbols to indicate they are "Second" options (they are enabled using the "2nd" command key), and there are green symbols for the "diamond" command key. I am completely blanking on the formal name of that button, but it is a green diamond shaped button that allows the green keys to be activated.

If you press the second button, then select the calculator key with the small circle above it (indicating degrees) that will allow you to input degrees. Then minutes are indicated by the small tick mark symbol, also accessed by the second command.

Remember that your calculator has to be in degrees mode. Your calculator has a "mode" button, and under "angles" set it to "degrees".

 Once you enter the values as they are shown on the page in your book, hitting "equals" or "enter" Will reveal the decimal value for those set degrees/minutes.

If you purchased a graphing calculator, it should have arrived with an instructions manual. Inside that manual they typically show you how to get to different functions and how to input different values. The index as well as the table of contents are great places to start when searching for certain functions.

If you tell me what kind of calculator you have I might can help more, but this should get you started.

Also, searching the internet for your particular calculator brand, followed by the words "degrees, minutes, to decimal" or "tutorial" will likely bring up helpful tips as well.

Here is one website I found that might help you

However if you are still having trouble, please contact us. 

Chapter 8

Ch 8.3 #33 - The solution for this problem is incorrect In Version 1 and Version 2 of the Solutions to Selected Odd Problems as well as in the published Student's Solutions Manual offered by McGraw Hill (ISBN: 0-07-242736-1).The correct answer is they will slide to the right.

Tests

Algebra II Test 2 - 2.7 #18 - Answer is +1.5i only. Need to test the -1.5i to see that it does not work - similar to #17.

Trig Test 2 - 7.2 #36. The solution posted to this problem in the Teacher's Guide has a typo. The first line of the solution should say cot(x-y) = cos(x-y) / sin(x-y).