**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.

**Problem 5**

Use the Pythagorean theorem and Example 1.

**Problems 6-16**

Use the definition of the trigonometric ratios.

**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.

**Problems 29-37**

Use your calculator; see Example 6.

**Problems 38-47**

Use a calculator; see Example 2.

**Problems 48-50**

Draw a figure and use the definition of tangent. See Example 5.

**Problems 51-52**

See Example 7; remember to measure the angle of depression from a horizontal.

**Problems 53**

Draw a figure. See Example 5.

**Problems 54-56**

See Example 5; remember to measure the angle of elevation from a horizontal.

**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/**

**Quick Math**

This site provides online graphing calculators. This is especially useful if you do not have your own calculator.

**http://www.quickmath.com/**

**The Math Forum @ Drexel**

This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.

**http://mathforum.org/**