# Homework Hints 7-5

[tippy title=”Problems 1-4″]Problems 1-4
These problems are designed to make sure you are familiar with the Pythagorean theorem as well as the definitions of sine, cosine, and tangent.[/tippy]

[tippy title=”Problem 5″]Problem 5
Use the Pythagorean theorem and Example 1.[/tippy]

[tippy title=”Problems 6-16″]Problems 6-16
Use the definition of the trigonometric ratios.[/tippy]

[tippy title=”Problems 17-28″]Problems 17-28
See Example 4; you will need to use a calculator for these problems. Do not forget to round your answer to four decimal places.[/tippy]

[tippy title=”Problems 29-37″]Problems 29-37
Use your calculator; see Example 6.[/tippy]

[tippy title=”Problems 38-47″]Problems 38-47
Use a calculator; see Example 2.[/tippy]

[tippy title=”Problems 48-50″]Problems 48-50
Draw a figure and use the definition of tangent. See Example 5.[/tippy]

[tippy title=”Problems 51-52″]Problems 51-52
See Example 7; remember to measure the angle of depression from a horizontal.[/tippy]

[tippy title=”Problem 53″]Problems 53
Draw a figure. See Example 5.[/tippy]

[tippy title=”Problems 54-56″]Problems 54-56
See Example 5; remember to measure the angle of elevation from a horizontal.[/tippy]

### Note: Homework Hints are given only for the Level 1 and Level 2 problems.

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

There are many sources for homework help on the internet.

Algebra.help
Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.
http://www.algebrahelp.com/